Acts 1: 12 - 14
12 Then they returned to Jerusalem from the mount called Olivet, which is near Jerusalem, a sabbath day's journey away;
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.
14 All these with one accord devoted themselves to prayer, together with the women and Mary the mother of Jesus, and with his brothers.

EWTN