G5441–φυλακτήριος–phulaktērios

saying -- `The prison indeed we found shut in all safety, and the keepers standing without before the doors, and having opened -- within we found no one.'

φύλακας phulakas “guards”

and when Herod was about to bring him forth, the same night was Peter sleeping between two soldiers, having been bound with two chains, guards also before the door were keeping the prison,

φύλακές phulakes “guards”

and Herod having sought for him, and not having found, having examined the guards, did command `them' to be led away to punishment, and having gone down from Judea to Cesarea, he was abiding `there'.

φύλακας phulakas “guards”