Acts 16:23-28

²³And when they had given them a great number of blows, they put them in prison, giving orders to the keeper of the prison to keep them safely:

²⁴And he, having such orders, put them into the inner prison with chains on their feet.

²⁵But about the middle of the night, Paul and Silas were making prayers and songs to God in the hearing of the prisoners;

²⁶And suddenly there was an earth-shock, so that the base of the prison was moved: and all the doors came open, and everyone's chains came off.

²⁷And the keeper, coming out of his sleep, and seeing the prison doors open, took his sword and was about to put himself to death, fearing that the prisoners had got away.

²⁸But Paul said in a loud voice, Do yourself no damage, for we are all here.