Acts 1:12-15

The disciples left the Mount of Olives and returned to Jerusalem, which was less than a mile away. Arriving there, they went into a large second-floor room to pray. Those present were Peter, John, Jacob, Andrew, Philip, Thomas, Bartholomew, Matthew, Jacob (the son of Alpheus), Simon (the zealot), Judas (the son of Jacob), and a number of women, including Mary, Jesus’ mother. His brothers were there as well. All of them were united in prayer, gripped with one passion, interceding night and day. During this time Peter stood up among the 120 believers who were gathered and said