Changing an Evil
Abu Sa’id Al-Khudri (radi Allahu anhu) reported that the Messenger of Allah (sal Allahu alaihi wa sallam) said, “Whoever amongst you sees an evil, he must change it with his hand; if he is unable to do so, then with his tongue; and if he is unable to do so, then with his heart; and that is the weakest form of Faith.”
This Hadith contains a very important prescription to prevent the Muslim society from all that which is forbidden in Islam. So long as Muslims adhered to it and ceaselessly and fearlessly performed their obligation of enjoining the right and forbidding the wrong, their society was largely safe from many evils and sins.
And Allah Knows Best!