2He had James, the brother of John, put to death with the sword.
3When he saw that this pleased the Jews, he proceeded to seize Peter also. This happened during the Feast of Unleavened Bread.
4After arresting him, he put him in prison, handing him over to be guarded by four squads of four soldiers each. Herod intended to bring him out for public trial after the Passover.
5So Peter was kept in prison, but the church was earnestly praying to God for him.
A little history lesson
When Herod saw that the crowd was pleased with death of John, he knew he would be even more popular if he killed the number one apostle, during Passover week when he would have a HUGE audience!!!
Extreme measures were taken to secure Peter until after Passover to be executed. Sixteen soldiers guarded him with 2 being handcuffed to him. It was impossible for him to escape!! The only thing Peter's fellow believers could do was PRAY!