Acts 12:6 in the King James Version
And when Herod would have brought him forth, the same night Peter was sleeping between two soldiers, bound with two chains: and the keepers before the door kept the prison.
Context
5 Peter therefore was kept in the prison, but constant prayer was made by the assembly to God for him.
6 The same night when Herod was about to bring him out, Peter was sleeping between two soldiers, bound with two chains. Guards in front of the door kept the prison.
7 And behold, an angel of the Lord stood by him, and a light shone in the cell. He struck Peter on the side and woke him up, saying, “Stand up quickly!” His chains fell off his hands.