«إِنَّ خَلْقَ أَحَدِكُمْ يُجْمَعُ فِي بَطْنِ أُمِّهِ أَرْبَعِينَ يَوْمًا، ثُمَّ يَكُونُ عَلَقَةً مِثْلَ ذَلِكَ، ثُمَّ يَكُونُ مُضْغَةً مِثْلَ ذَلِكَ، ثُمَّ يَبْعَثُ اللهُ إِلَيْهِ مَلَكًا فَيُؤْمَرُ بِأَرْبَعِ كَلِمَاتٍ، بِكَتْبِ رِزْقِهِ، وَعُمْرِهِ، وَعَمَلِهِ، وَشَقِيٌّ أَوْ سَعِيد»
 (The matter of the creation of one of you is put together in the womb of the mother in forty days, and then he becomes a clot of thick blood for a similar period, and then a piece of flesh for a similar period. Then Allah sends an angel who is ordered to write four things. He is ordered to write down his provisions, his life span, his deeds, and whether he will be blessed or wretched.'') In another Hadith, the Prophet said, Â