15 In those days Peter stood up among the brothers (the company of persons was in all about 120) and said, 16 “Brothers, the Scripture had to be fulfilled, which the Holy Spirit spoke beforehand by the mouth of David concerning Judas, who became a guide to those who arrested Jesus. 17 For he was numbered among us and was allotted his share in this ministry.” 18 (Now this man acquired a field with the reward of his wickedness, and falling headlong[d] he burst open in the middle and all his bowels gushed out. 19 And it became known to all the inhabitants of Jerusalem, so that the field was called in their own language Akeldama, that is, Field of Blood.) 20 “For it is written in the Book of Psalms,
“‘May his camp become desolate, and let there be no one to dwell in it’; and “‘Let another take his office.’
21 So one of the men who have accompanied us during all the time that the Lord Jesus went in and out among us, 22 beginning from the baptism of John until the day when he was taken up from us—one of these men must become with us a witness to his resurrection.” 23 And they put forward two, Joseph called Barsabbas, who was also called Justus, and Matthias. 24 And they prayed and said, “You, Lord, who know the hearts of all, show which one of these two you have chosen 25 to take the place in this ministry and apostleship from which Judas turned aside to go to his own place.” 26 And they cast lots for them, and the lot fell on Matthias, and he was numbered with the eleven apostles. (Acts 1:15-26)
Now it seems that there were enough men present in one place for the disciples to form a constitutional body according to the requirements of Jewish Law.
After praying and studying the scriptures it became clear to Peter what they must do; they must restore the full number of Yeshu’s represent-atives from 11 to 12. So who was it that he had chosen?
Two names were suggested; so by prayer to Yeshu and by the casting of lots they discovered which of the two was the man to share in the apostles’ work of being his witnesses, having lived with Yeshu throughout the three years of his ministry.