Acts 12:1-5

Now about that time Herod the king put forth his hands to afflict certain of the church. And he killed James the brother of John with the sword. And when he saw that it pleased the Jews, he proceeded to seize Peter also. And those were the days of unleavened bread. And when he had taken him, he put him in prison, and delivered him to four quaternions of soldiers to guard him; intending after the Passover to bring him forth to the people. Peter therefore was kept in the prison: but prayer was made earnestly of the church unto God for him.