The nuclear forty On the authority of Abu Omar It was said: Abu Omar Sufyan bin Abdullah Al-Thaqafi, may God be pleased with him, said I said, O Messenger of God Tell me something about Islam that I will not ask anyone else about He said Say I believe in God Then straighten up Narrated by Muslim This hadith combines the truth of religion in two great words Sincere faith in God Then steadfastness in obeying Him and staying true to His law Faith is not just a verbal statement Rather, it is a practical commitment It appears in worship, morals, and daily behavior Integrity means continuing obedience and abandoning disobedience With devotion to God It is the path to salvation and happiness in this world and the hereafter Because the greatest thing a believer needs is after knowing the truth It is steadfastness