Acts 1:21-23

21 Wherefore of these men who have been with us all the time that the Lord Jesus was going in and out over us,

22 Beginning from the baptism of John, till the day that he was taken up from us, one must be ordained, to be a witness with us of his resurrection.

23 And they appointed two, Joseph called Barsabas, who was surnamed Justus, and Matthias.