Acts 12:16

Overview - Acts 12
1	King Herod persecutes the Christians, kills James, and imprisons Peter; whom an angel delivers upon the prayers of the church.
20	Herod in his pride taking to himself the honour due to God, is stricken by an angel, and dies miserably.
24	After his death, the word of God prospers.
25	Saul and Barnabas return to Antioch.

Acts 12:16  (King James Version)
But Peter continued knocking: and when they had opened the door, and saw him, they were astonished.