Adverb alēthōs (truly) 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

14: 33And those in the boat worshiped him, saying, "Truly (alēthōs) you are the Son of God."
26: 73After a little while the bystanders came up and said to Peter, "Truly (alēthōs) you are also one of them, for your accent betrays you."
27: 54Now when the centurion and those with him, who were keeping watch over Jesus, saw the earthquake and what took place, they were terrified and said, "Truly (alēthōs) this man was God's Son!"

Mark

14: 70But again he denied it. Then after a little while the bystanders again said to Peter, "Truly (alēthōs) you are one of them; for you are a Galilean."
15: 39Now when the centurion, who stood facing him, saw that in this way he breathed his last, he said, "Truly (alēthōs) this man was God's Son!"

Luke

9: 27But truly (alēthōs) I tell you, there are some standing here who will not taste death before they see the kingdom of God."
12: 44Truly (alēthōs) I tell you, he will put that one in charge of all his possessions.
21: 3He said, "Truly (alēthōs) I tell you, this poor widow has put in more than all of them;

John

1: 47When Jesus saw Nathanael coming toward him, he said of him, "Here is truly (alēthōs) an Israelite in whom there is no deceit!"
4: 42They said to the woman, "It is no longer because of what you said that we believe, for we have heard for ourselves, and we know that this is truly (alēthōs) the Savior of the world."
6: 14When the people saw the sign that he had done, they began to say, "This is truly (alēthōs) the prophet who is to come into the world."
7: 26And here he is, speaking openly, but they say nothing to him! Can it be that the authorities truly (alēthōs) know that this is the Messiah?
7: 40When they heard these words, some in the crowd said, "This is truly (alēthōs) the prophet."
8: 31Then Jesus said to the Jews who had believed in him, "If you continue in my word, you are truly (alēthōs) my disciples;
17: 8for the words that you gave to me I have given to them, and they have received them and know truly (alēthōs) that I came from you; and they have believed that you sent me.

Acts

12: 11Then Peter came to himself and said, "Now I truly (alēthōs) know that the Lord has sent his angel and rescued me from the hands of Herod and from all that the Jewish people were expecting."

1 John

2: 5but whoever obeys his word, truly (alēthōs) in this person the love of God has reached perfection. By this we may be sure that we are in him:

1 Thessalonians

2: 13We also constantly give thanks to God for this, that when you received the word of God that you heard from us, you accepted it not as a human word but as what it truly (alēthōs) is, God's word, which is also at work in you believers.

Genesis (LXX)

18: 13And the Lord said to Abraam, Why is it that Sarrha has laughed in herself, saying, Shall I then truly (alēthōs) bear? but I am grown old.
20: 12For truly (alēthōs) she is my sister by my father, but not by my mother, and she became my wife.

Exodus (LXX)

33: 16And how shall it be truly (alēthōs) known, that both I and this people have found favour with thee, except only if thou go with us? So both I and thy people shall be glorified beyond all the nations, as many as are upon the earth.

Deuteronomy (LXX)

17: 4and it be told thee, and thou shalt have enquired diligently, and, behold, the thing truly (alēthōs) took place, this abomination has been done in Israel;

Joshua (LXX)

7: 20And Achar answered Joshua, and said, Truly (alēthōs) I have sinned against the Lord God of Israel: thus and thus have I done:

1 Samuel (LXX: 1 Kings)

22: 7And Saul said to his servants that stood by him, Hear now, ye sons of Benjamin, will the son of Jessae truly (alēthōs) give all of you fields and vineyards, and will he make you all captains of hundreds and captains of thousands?

1 Kings (LXX: 3 Kings)

8: 27But will God truly (alēthōs) dwell with men upon the earth? if the heaven and heaven of heavens will not suffice thee, how much less even this house which I have built to thy name?
18: 39And all the people fell upon their faces, and said, Truly (alēthōs) the Lord is God; he is God.

2 Chronicles (LXX)

6: 18For will God truly (alēthōs) dwell with men upon the earth? if the heaven and the heaven of heavens will not suffice thee, what then is this house which I have built?

Jeremiah (LXX)

28: 13dwelling on many waters, and amidst the abundance of her treasures; thine end is come truly (alēthōs) into thy bowels.
35: 6and Jeremias said, May the Lord truly (alēthōs) do thus; may he confirm thy word which thou dost prophesy, to return the vessels of the house of the Lord, and all the captivity, out of Babylon to this place.

Daniel (LXX)

3: 14And Nabuchodonosor answered and said to them, Sedrach, Misach, and Abdenago, are ye not truly (alēthōs) serving my gods, and worshiping the golden image which I have set up?
3: 91And Nabuchodonosor heard them singing praises; and he wondered, and rose up in haste, and said to his nobles, Did we not cast three men bound into the midst of the fire? and they said to the king, Truly (alēthōs), O king.

Psalms (LXX)

57: 2If ye do truly (alēthōs) speak righteousness, then do ye judge rightly, ye sons of men.

Ruth (LXX)

3: 12And now I am truly (alēthōs) akin to thee; nevertheless there is a kinsman nearer than I.

2 Maccabees (LXX)

3: 38If thou hast any enemy or traitor, send him thither, and thou shalt receive him well scourged, if he escape with his life: for in that place, truly (alēthōs), there is an especial power of God.
12: 12Then Judas, thinking truly (alēthōs) that they would be profitable in many things, granted them peace: whereupon they shook hands, and so they departed to their tents.

4 Maccabees (LXX)

6: 5But Eleazar, the high-minded and truly (alēthōs) noble, as one tortured in a dream, regarded it not at all.
11: 23I, too, bearing with me a great avenger, O deviser of tortures, and enemy of the truly (alēthōs) pious.
17: 11For it was a truly (alēthōs) divine contest which was carried through by them.