I asked the Prophet (may Allah's peace and blessings be upon him): "Which sin is the gravest in the sight of Allah?" He said: "To set an equal to Allah while He created you There is no one who bears witness that there is no god but Allah and that Muhammad is His slave and Messenger, sincerely from his heart, except that Allah will make him forbidden to Hellfire The Kursi (footstool) in comparison to the Throne is only like an iron ring thrown in a desert on earth the people who will receive the severest punishment on the Day of Judgment will be those who try to emulate Allah'sAllah's creation Allah has appointed an angel in charge of the womb, and the angel says: O Lord, (it is) a sperm drop! O Lord, (it is now ) a clot! O Lord, (it is now) a piece of flesh. Then, when Allah wills to complete its creation, the angel asks: O Lord, (will it be) a male or female? Wretched (an evil doer) or blessed (doer of good)? How much will his provisions be? How long will he live? All that is written while the fetus is still in his mother's womb Do you know what your Lord has said?" They replied: "Allah and His Messenger know best." He said: "He has said: 'Some of My servants have entered the morning as believers in Me and some as disbelievers Is He Who is able to make them walk on their feet not able enough to make them walk upon their faces on the Day of Resurrection?