And when he had considered the thing, he came to the house of Mary the mother of John, whose surname was Mark; where many were gathered together praying. And when he had considered - When he had weighed every thing, and was fully satisfied of the Divine interposition, he went to the house of Mary, the mother of John Mark, the author of the Gospel, where it appears many were gathered together making prayer and supplication, and probably for Peter's release.
Related Commentaries of Acts 12:12
Acts 12:12
12 And when he had considered the thing, he came to the house of Mary the mother of John, whose surname was Mark; where many were gathered together praying.