(12) Mary the mother of John, whose surname was Mark.--On the probable identity of this Mark with the evangelist of that name, see Introduction to St. Mark's Gospel. Here we may note (1) that as being mentioned by St. Peter as his "son" (1Peter 5:13) he was probably converted by him; (2) that he was cousin to Barnabas, probably through his mother, and was therefore at least connected with the tribe of Levi (Acts 4:36), and possibly belonging to it; (3) that the fact that Mary's house was the meeting-place of the Church indicates comparative wealth, as did Barnabas's sale of his estate; (4) that the absence of any mention of Mark's father makes it probable that she was a widow; (5) that the Latin name of Marcus indicates some point of contact with Romans or Roman Jews.

Many were gathered together praying.--The facts of the case show that the meeting was held at night, possibly to avoid persecution, or, it may be, as the sequel of the evening gathering to "break bread."

Verse 12. - And were praying for praying, A.V. When he had considered; better, with Meyer and Alford, when he perceived it, viz. the truth of his deliverance. Mary the mother of John was aunt to Barnabas (Colossians 4:10). If Paul and Barnabas were not in her house at the time (which there is no evidence that they were), it is likely that all the particulars of Peter's escape may have been communicated to Paul by John Mark, and by him repeated to Luke. That they went to the house of Mary before their return seems certain from their taking Mark with them to Antioch (ver. 25), possibly to deliver him from the danger Christians were in at Jerusalem at this time.

12:12-19 God's providence leaves room for the use of our prudence, though he has undertaken to perform and perfect what he has begun. These Christians continued in prayer for Peter, for they were truly in earnest. Thus men ought always to pray, and not to faint. As long as we are kept waiting for a mercy, we must continue praying for it. But sometimes that which we most earnestly wish for, we are most backward to believe. The Christian law of self-denial and of suffering for Christ, has not done away the natural law of caring for our own safety by lawful means. In times of public danger, all believers have God for their hiding-place; which is so secret, that the world cannot find them. Also, the instruments of persecution are themselves exposed to danger; the wrath of God hangs over all that engage in this hateful work. And the range of persecutors often vents itself on all in its way.And when he had considered the thing,.... The whole of the salvation wrought for him; or rather, where he should go, to what house he should betake himself; ere he was aware,

he came to the house of Mary the mother of John, whose surname was Mark. This good woman seems to be a widow, no mention being made of her husband, and was sister to Barnabas, Colossians 4:10. She is described by a son she had, whose name was John Mark, because of the frequent mention made of him hereafter; her house being large, and her heart as large as her house, the saints met here, and were welcome, and where they were at this time, though so late:

where many were gathered together, praying; the Ethiopic version adds, "for him"; and there were some in other places, for one place could not hold them all; see Acts 12:17 they held out to the end in prayer; this was their last effort in this way, and in this they were no doubt exceeding vehement and importunate, and they succeeded; so true is that observation in James 5:16.