Bible Verses About Prisons: Condemned persons till executed

They put him under guard until ADONAI would tell them what to do.

so when Herod seized him, he threw him in prison, handing him over to be guarded by four squads of four soldiers each, with the intention of bringing him to public trial after Pesach.

So Kefa was being held under watch in prison, but intense prayer was being made to God on his behalf by the Messianic community.