with them he ordered them not to depart from Jerusalem, but to wait for the promise of the Father, which, he said, “you heard from me; (Lu 24:49)5 for John baptized with water, but you will be baptized with
12 Then they returned to Jerusalem from the mount called Olivet, which is near Jerusalem, a Sabbath day’s journey away. (Lu 24:50; Lu 24:52)13 And when they had entered, they went up to the upper room, where they were staying, Peter and John and James and Andrew, Philip and Thomas, Bartholomew and Matthew, James the son of Alphaeus and Simon the Zealot and Judas the son of James. (Mt 10:2; Mr 3:16; Lu 6:14; Ac 9:37; Ac 9:39; Ac 20:8; Ac 21:20)14 All these with one accord were devoting themselves to prayer, together with the women and Mary the mother of Jesus, and his brothers.
1. Or brothers and sisters. In New Testament usage, depending on the context, the plural Greek word adelphoi (translated “brothers”) may refer either to brothers or to brothers and sisters; also verse 15
 he burst open in the middle and all his bowels gushed out. (Mt 26:14; Mt 27:5)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.) (Ac 21:40)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.’ (Ps 69:25; Ps 109:8)21 So one of the men who have accompanied us during all the time that the Lord Jesus went in and out among us, (Nu 27:17; De 31:2; 1Sa 18:13; Joh 15:27)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.” (Mr 1:1; Lu 24:48; Ac 1:2; Ac 1:8; Ac 1:9; Ac 4:33; Ac 13:24; 1Pe 1:3)23 And they put forward two, Joseph called Barsabbas, who was also called Justus, and Matthias. (Ac 1:26; Ac 15:22; Ac 18:7; Col 4:11)24 And they prayed and said, “You, Lord, who know the hearts of all, show which one of these two you have chosen (1Sa 16:7; Ac 6:6; Ac 13:3; Ro 8:27)25 to take the place in this ministry and apostleship from which Judas turned aside to go to his own place.” (Ac 1:17; Ro 1:5; 1Co 9:2; Ga 2:8)26 And they cast lots for them, and the lot fell on Matthias, and he was numbered with the eleven apostles.