Acts 12:6

And when Herod would have brought him forth, the same night Peter was sleeping between two soldiers. See Peter sleeping, and not in distress or fear! That same night, after which he was to be brought forth, he slept, having cast all upon God. "Between two soldiers, bound with two chains." Mark, how strict the ward!

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. And, behold, the angel of the Lord came upon him, and a light shined in the prison: and he smote Peter on the side, and raised him up, saying, Arise up quickly. And his chains fell off from his hands. In that night He delivered him. "And a light shined in the prison," that he might not deem it fancy: and none saw the light, but he only. For if, notwithstanding this was done, he thought it a fancy, because of its unexpectedness; if this had not been, much more would he have thought this: so prepared was he for death. For his having waited there many days and not being saved caused this. Why then, say you, did He not suffer him to fall into the hands of Herod, and then deliver him? Because that would have brought people into astonishment, whereas this was credible: and they would not even have been thought human beings.