Acts 1:12-14 comments: Mount Olivet

1:12 ¶  Then returned they unto Jerusalem from the mount called Olivet, which is from Jerusalem a sabbath day’s journey. 13  And when they were come in, they went up into an upper room, where abode both Peter, and James, and John, and Andrew, Philip, and Thomas, Bartholomew, and Matthew, James the son of Alphaeus, and Simon Zelotes, and Judas the brother of James. 14  These all continued with one accord in prayer and supplication, with the women, and Mary the mother of Jesus, and with his brethren.

A sabbath day’s journey, according to John Gill and Matthew Henry, was about 2,000 cubits from any town. The restriction from traveling on the Sabbath is found under the Law.

Exodus 16:29  See, for that the LORD hath given you the sabbath, therefore he giveth you on the sixth day the bread of two days; abide ye every man in his place, let no man go out of his place on the seventh day.

The distance one could travel based on tradition was based on the distance from the ark of the covenant the Hebrews were to walk crossing the river Jordan.

Joshua 3:4  Yet there shall be a space between you and it, about two thousand cubits by measure: come not near unto it, that ye may know the way by which ye must go: for ye have not passed this way heretofore.

Like modern Christians the Jews were always looking for loopholes in the Law.

These events transpired on the hill called Mount Olivet or the Mount of Olives where David ascended mourning at Absalom’s rebellion in 2Samuel 15:30. It plays a significant part in the end of history as per Zechariah 14:4 when Christ returns. Jesus sat on it when he talked about end times in Matthew 24. It is where He was arrested before His crucifixion as per Matthew 26:30 with the Garden of Gethsemane at the base of it. So, interestingly, God’s king ascends Mount Olivet in mourning, Christ speaks of the end of history from it, is arrested on it, and ascends from it, and will land on it.

The eleven remaining Apostles and the women, along with Jesus’ mother, Mary, pray together in a upper story of a house that was one of theirs or was provided for them by someone. Either Jesus’ brothers are referred to specifically here or it is a reference to His followers as brethren. There were no buildings specifically set aside for church worship until late in the second century.