Noun sakkos (sack, sackcloth) in the Bible

(Translation from NRSV for the New Testament and Brenton for the Septuagint with a few modifications for a more literal meaning)

Matthew

11: 21"Woe to you, Chorazin! Woe to you, Bethsaida! For if the deeds of power done in you had been done in Tyre and Sidon, they would have repented long ago in sackcloth (sakkos) and ashes.

Luke

10: 13"Woe to you, Chorazin! Woe to you, Bethsaida! For if the deeds of power done in you had been done in Tyre and Sidon, they would have repented long ago, sitting in sackcloth (sakkos) and ashes.

Revelation

6: 12When he opened the sixth seal, I looked, and there came a great earthquake; the sun became black as sackcloth (sakkos), the full moon became like blood,
11: 3And I will grant my two witnesses authority to prophesy for one thousand two hundred sixty days, wearing sackcloth (sakkos)."

Genesis (LXX)

37: 34And Jacob rent his clothes, and put sackcloth (sakkos) on his loins, and mourned for his son many days.
42: 25And Joseph gave orders to fill their vessels with corn, and to return their money to each into his sack (sakkos), and to give them provision for the way; and it was so done to them.
42: 35And it came to pass as they were emptying their sacks (sakkos), there was each man's bundle of money in his sack (sakkos); and they and their father saw their bundles of money, and they were afraid.

Leviticus (LXX)

11: 32And on whatsoever one of their dead bodies shall fall it shall be unclean; whatever wooden vessel, or garment, or skin, or sack (sakkos) it may be, every vessel in which work should be done, shall be dipped in water, and shall be unclean till evening; and then it shall be clean.

Josuah (LXX)

9: 4And they also wrought craftily, and they went and made provision and prepared themselves; and having taken old sacks (sakkos) on their shoulders, and old and rent and patched bottles of wine,

2 Samuel (LXX: 2 Kings)

3: 31And David said to Joab and to all the people with him, Rend your garments, and gird yourselves with sackcloth (sakkos), and lament before Abenner. And king David followed the bier.
12: 16And David enquired of God concerning the child, and David fasted, and went in and lay all night in a sackcloth (sakkos) upon the ground.
21: 10And Respha the daughter of Aia took sackcloth (sakkos), and fixed it for herself on the rock in the beginning of barley harvest, until water dropped upon them out of heaven: and she did not suffer the birds of the air to rest upon them by day, nor the beasts of the field by night.

1 Kings (LXX: 3 Kings)

21 (20): 16And it came to pass, when Achaab heard that Nabuthai the Jezraelite was dead, that he rent his garments, and put on sackcloth (sakkos). And it came to pass afterward, that Achaab arose and went down to the vineyard of Nabuthai the Jezraelite, to take possession of it.
21 (20): 27And because of the word, Achaab was pierced with sorrow before the Lord, and he both went weeping, and rent his garment, and girt sackcloth (sakkos) upon his body, and fasted; he put on sackcloth (sakkos) also in the day that he smote Nabuthai the Jezraelite, and went his way.
20 (21): 31And he said to his servants, I know that the kings of Israel are merciful kings: let us now put sackcloth (sakkos) upon our loins, and ropes upon our heads, and let us go forth to the king of Israel, if by any means he will save our souls alive.
20 (21): 32So they girt sackcloth (sakkos) upon their loins, and put ropes upon their heads, and said to the king of Israel, Thy servant the son of Ader says, Let our souls live, I pray thee. And he said, Does he yet live? He is my brother.

2 Kings (LXX: 4 Kings)

6: 30And it came to pass, when the king of Israel heard the words of the woman, that he rent his garments; and he passed by on the wall, and the people saw sackcloth (sakkos) within upon his flesh.
19: 1And it came to pass when king Ezekias heard it, that he rent his clothes, and put on sackcloth (sakkos), and went into the house of the Lord.
19: 2And he sent Heliakim the steward, and Somnas the scribe, and the elders of the priests, clothed with sackcloth (sakkos), to Esaias the prophet the son of Amos.

1 Chronicles (LXX)

21: 16And David lifted up his eyes, and saw the angel of the Lord, standing between the earth and the heaven, and his sword drawn in his hand, stretched out over Jerusalem: and David and the elders clothed in sackcloth (sakkos), fell upon their faces.

Nehemiah (LXX: Esdras B)

9 (19): 1Now on the twenty-fourth day of this month the children of Israel assembled with fasting, and in sackcloths (sakkos), and with ashes on their head.

Isaiah (LXX)

3: 24And there shall be instead of a sweet smell, dust; and instead of a girdle, thou shalt gird thyself with a rope; and instead of a golden ornament for the head, thou shalt have baldness on account of thy works; and instead of a tunic with a scarlet ground, thou shalt gird thyself with sackcloth (sakkos).
15: 3 Gird yourselves with sackcloth (sakkos) in her streets: and lament upon her roofs, and in her streets, and in her ways; howl all of you with weeping.
20: 2 then the Lord spoke to Esaias the son of Amos, saying, Go and take the sackcloth (sakkos) off thy loins, and loose thy sandals from off thy feet, and do thus, going naked and barefoot.
22: 12And the Lord, the Lord of hosts, called in that day for weeping, and lamentation, and baldness, and for girding with sackcloth (sakkos):
32: 11Be amazed, be pained, ye confident ones: strip you, bare yourselves, gird sackcloth (sakkos) your loins;
37: 1 And it came to pass, when king Ezekias heard it, that he rent his clothes, and put on sackcloth (sakkos), and went up to the house of the Lord.
37: 2 And he sent Heliakim the steward, and Somnas the scribe, and the elders of the priests clothed with sackcloth (sakkos), to Esaias the son of Amos, the prophet. And they said to him, Thus says Ezekias,
50: 3 I will clothe the sky with darkness, and will make its covering as sackcloth (sakkos).
58: 5I have not chosen this fast, nor such a day for a man to afflict his soul; neither though thou shouldest bend down thy neck as a ring, and spread under thee sackcloth (sakkos) and ashes, neither thus shall ye call a fast acceptable.

Jeremiah (LXX)

4: 8For these things gird yourselves with sackcloths (sakkos), and lament, and howl: for the anger of the Lord is not turned away from you.
6: 26O daughter of my people, gird thyself with sackcloth (sakkos): sprinkle thyself with ashes; make for thyself pitiable lamentation, as the mourning for a beloved son: for misery will come suddenly upon you.
49 (30): 3 (19)Howl, O Esebon, for Gai has perished; cry, ye daughters of Rabbath, gird yourselves with sackcloths (sakkos), and lament; for Melchol shall go into banishment, his priests and his princes together.
48 (31): 37They shall all have their heads shaved in every place, and every beard shall be shaved; and all hands shall beat the breasts, and on all loins shall be sackcloth (sakkos).

Ezekiel (LXX)

7: 18And they shall gird themselves with sackcloth (sakkos), and amazement shall cover them; and shame shall be upon them, even upon every face, and baldness upon every head.

Amos (LXX)

8: 10and I will turn your feasts into mourning, and all your songs into lamentation; and I will bring up sackcloth (sakkos) on all loins, and baldness on every head; and I will make them as the mourning of a beloved friend, and those with them as a day of grief.

Baruch (LXX)

4: 20I have put off the clothing of peace, and put upon me the sackcloth (sakkos) of my prayer: I will cry unto the Everlasting in my days.

Joel (LXX)

1: 8Lament to me more than a virgin girded with sackcloth (sakkos) for the husband of her youth.
1: 13Gird yourselves, and lament, ye priests: mourn, ye that serve at the altar: go in, sleep in sackcloths (sakkos), ye that minister to God: for the meat-offering and drink-offering are withheld from the house of your God.

Jonas (LXX)

3: 5And the men of Nineve believed God, and proclaimed a fast, and put on sackcloths (sakkos), from the greatest of them to the least of them.
3: 6And the word reached the king of Nineve, and he arose from off his throne, and took off his raiment from him, and put on sackcloth (sakkos), and sat on ashes.
3: 8So men and cattle were clothed with sackcloths (sakkos), and cried earnestly to God; and they turned every one from their evil way, and from the iniquity that was in their hands, saying,

Daniel (LXX)

9: 3And I set my face toward the Lord God, to seek him diligently by prayer and supplications, with fastings and sackcloth (sakkos).

Psalms (LXX)

30 (29): 12Thou hast turned my mourning into joy for me: thou hast rent off my sackcloth (sakkos), and girded me with gladness;
35 (34): 13But I, when they troubled me, put on sackcloth (sakkos), and humbled my soul with fasting: and my prayer shall return to my own bosom.
69 (68): 12And I put on sackcloth (sakkos) for my covering; and I became a proverb to them.

Lamentations (LXX)

2: 10Jod. The elders of the daughter of Sion have sat upon the ground, they have kept silence: they have cast up dust upon their heads; they have girded themselves with sackcloths (sakkos): they have brought down to the ground the chief virgins in Jerusalem.

Job (LXX)

16: 15They sewed sackcloth (sakkos) upon my skin, and my strength has been spent on the ground.

Esther (LXX)

4: 1But Mardochaeus having perceived what was done, rent his garments, and put on sackcloth (sakkos), and sprinkled dust upon himself; and having rushed forth through the open street of the city, he cried with a loud voice, A nation that has done no wrong is going to be destroyed.
4: 2And he came to the king's gate, and stood; for it was not lawful for him to enter into the palace, wearing sackcloth (sakkos) and ashes.
4: 3And in every province where the letters were published, there was crying and lamentation and great mourning on the part of the Jews: they spread for themselves sackcloth (sakkos) and ashes.
4: 4And the queen's maids and chamberlains went in and told her: and when she had heard what was done, she was disturbed; and she sent to clothe Mardochaeus, and take away his sackcloth (sakkos); but he consented not.

Judith (LXX)

4: 10both they, and their wives, and their children, and their cattle, and every stranger and hireling, and their servants bought with money, put sackcloth (sakkos) upon their loins.
4: 11Thus every man and woman, and the little children, and the inhabitants of Jerusalem, fell before the temple, and cast ashes upon their heads, and spread out their sackcloth (sakkos) before the face of the Lord:
4: 12also they put sackcloth (sakkos) about the altar, and cried to the God of Israel all with one consent earnestly, that he would not give their children for a prey, and their wives for a spoil, and the cities of their inheritance to destruction, and the sanctuary to profanation and reproach, and for the nations to rejoice at.
4: 14And Joacim the high priest, and all the priests that stood before the Lord, and they which ministered unto the Lord, had their loins girt with sackcloth (sakkos), and offered the daily burnt offerings, with the vows and free gifts of the people,
8: 5And she made her a tent upon the top of her house, and put on sackcloth (sakkos) upon her loins, and ware her widow's apparel.
9: 1Then Judith fell upon her face, and put ashes upon her head, and uncovered the sackcloth (sakkos) wherewith she was clothed; and about the time that the incense of that evening was offered in Jerusalem in the house of the Lord, Judith cried with a loud voice, and said,
10: 3and pulled off the sackcloth (sakkos) which she had on, and put off the garments of her widowhood, and washed her body all over with water, and anointed herself with precious ointment, and braided the hair of her head, and put on a tire upon it, and put on her garments of gladness, wherewith she was clad during the life of Manasses her husband.

1 Maccabees (LXX)

2: 14Then Mattathias and his sons rent their clothes, and put on sackcloth (sakkos), and mourned very sore.
3: 47Then they fasted that day, and put on sackcloth (sakkos), and cast ashes upon their heads, and rent their clothes,

2 Maccabees (LXX)

3: 19And the women, girt with sackcloth (sakkos) under their breasts, abounded in the streets, and the virgins that were kept in ran, some to the gates, and some to the walls, and others looked out of the windows.
10: 25But when he drew near, they that were with Maccabeus turned themselves to pray unto God, and sprinkled earth upon their heads, and girded their loins with sackcloth (sakkos),

Psalms of Solomon (LXX)

2: 20She girded on sackcloth (sakkos) instead of comely raiment, A rope (was) about her head instead of a crown.