Acts 12:3-5

³And seeing that it was pleasing to the Jews, he proceeded further to arrest Peter also (these were during the days of Unleavened Bread),

⁴whom also seizing, he put him in prison, and handed him over to four four-man squads of soldiers to guard him, planning after the Passover to bring him again to the people.

⁵Therefore Peter was kept in prison; but earnest prayer was being made by the church to God on his behalf.