Acts 12:3-5

Young's Literal Translation

³ and having seen that it is pleasing to the Jews, he added to lay hold of Peter also -- and they were the days of the unleavened food --

⁴ whom also having seized, he did put in prison, having delivered [him] to four quaternions of soldiers to guard him, intending after the passover to bring him forth to the people.

⁵ Peter, therefore, indeed, was kept in the prison, and fervent prayer was being made by the assembly unto God for him,