Acts 1:20-26

20 For in the book of Psalms it says, Let his house be waste, and let no man be living in it: and, Let his position be taken by another.
21 For this reason, of the men who have been with us all the time, while the Lord Jesus went in and out among us,
22 Starting from the baptism of John till he went up from us, one will have to be a witness with us of his coming back from death.
23 And they made selection of two, Joseph, named Barsabbas, whose other name was Justus, and Matthias.
24 And they made prayers and said, Lord, having knowledge of the hearts of all men, make clear which of these two has been marked out by you,
25 To take that position as a servant and Apostle, from which Judas by his sin was shut out, so that he might go to his place.
26 And they put it to the decision of chance, and the decision was given for Matthias, and he was numbered with the eleven Apostles.
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