RobH_en_tn/act/12/05.md

So Peter was kept in the prison

This implies that the soldiers continually guarded Peter in prison. This can be stated in active form. Alternate translation: "So the soldiers guarded Peter in the prison" (See: rc://en/ta/man/translate/figs-activepassive and rc://en/ta/man/translate/figs-explicit)

prayer was made earnestly to God for him by those in the church

This can be stated in active form. Alternate translation: "the group of believers in Jerusalem earnestly prayed to God for him" (See: rc://en/ta/man/translate/figs-activepassive)

earnestly

continuously and with dedication