Acts 1:13

1:13 When they had entered Jerusalem, they went to the upstairs room where they were staying. Peter and John, and James, and Andrew, Philip and Thomas, Bartholomew and Matthew, James son of Alphaeus and Simon the Zealot, and Judas son of James were there.

Acts 20:8

20:8 (Now there were many lamps in the upstairs room where we were meeting.)

Mark 14:15

14:15 He will show you a large room upstairs, furnished and ready. Make preparations for us there.”