After his arrest Peter was put in jail, where he was handed over to be guarded by four groups of four soldiers each. Herod planned to put him on trial in public after Passover.
The night before Herod was going to bring him out to the people, Peter was sleeping between two guards. He was tied with two chains, and there were guards on duty at the prison gate.
as you help us by means of your prayers for us. So it will be that the many prayers for us will be answered, and God will bless us; and many will raise their voices to him in thanksgiving for us.