Acts 1:12 - Joseph Benson’s Commentary on the Old and New Testaments

Then returned they unto Jerusalem According to their Master's appointment, having first worshipped him, Luke 24:52. Here they were in the midst of enemies; but it seems, though immediately after Christ's resurrection they were watched, and were in fear of the Jews, yet after it was known that they were gone into Galilee, no notice was taken of their return to the city, nor any further search made for them. In Jerusalem they employed themselves in a daily course of public and private devotion, rejoicing in what they had seen and heard, and firmly believing some extraordinary event was at hand, whereby they should be more fully qualified for the great work assigned them; which, whatever the hazard of it might be, they were firmly determined to undertake and prosecute.