Abū Saʿīd al-Khuḍrī narrated that he heard the Messenger of Allahﷺ say, “Whosoever of you sees an evil, let him change it with his hand; and if he is not able to do so, then [let him change it] with his tongue; and if he is not able to do so, then with his heart - and that is the weakest of faith.