On the authority of Abu Muhammad Abdullah ibn ’Amr bin al-’Aas (may Allah be pleased with him) who said, "The Messenger of Allah (peace and blessings of Allah be upon him) said, 'None of you [truly] believes until his desires are subservient to that which I have brought.'" Imam an-Nawawi says, "We have related it in Kitab al-Hujjah with a saheeh (authentic) chain of narrators."