And We have not made the wardens of the fire others than angels, and We have not made their number but as a trial for those who disbelieve, that those who have been given the Book (scriptures) may be certain and those who believe may increase in faith, and those who have been given the Book and the believers may not doubt, and that those in whose heart is a disease and the unbelievers may say, "What does Allah mean by this parable?" Thus does Allah make err whom He wills, and He guides whom He wills, and none knows the hosts (or forces) of your Lord but He Himself; and this is naught but a reminder to the mortals.