The nuclear forty On the authority of Abu Saeed Al-Khudri, may God be pleased with him, he said I heard the Messenger of God, may God bless him and grant him peace, say Whoever among you sees an evil, let him change it with his hand If he cannot, then with his tongue If he cannot, then with his heart That is the weakest of faith Narrated by Muslim This hadith explains a great obligation of Islam It is enjoining good and forbidding evil It is a reason for preserving the well-being of society Preventing the spread of corruption The Prophet, may God bless him and grant him peace, arranged it Change ranks as possible Which indicates the mercy of Sharia law And taking into account people's capabilities The hadith teaches the Muslim responsibility towards his religion and society He must be positive in correcting the error, each according to his ability