"Peter was therefore kept in prison, but constant prayer was offered to God for him by the church." (Acts 12:5; NKJV)
Pray.
Pray some more.
Keep praying.
But motioning to them with his hand to keep silent, he declared to them how the Lord had brought him out of the prison. And he said, "Go, tell these things to James and to the brethren." And he departed and went to another place. (Acts 12:17; NKJV)