Verses with the word keeper in the New Testament (2 verses):

Acts 16:27
And the keeper of the prison awaking out of his sleep, and seeing the prison doors open, he drew out his sword, and would have killed himself, supposing that the prisoners had been fled.

Acts 16:36
And the keeper of the prison told this saying to Paul, The magistrates have sent to let you go: now therefore depart, and go in peace.