حَدَّثَنَا هُشَيْمٌ أَنْبَأَنَا عَلِيُّ بْنُ زَيْدٍ قَالَ سَمِعْتُ أَبَا عُبَيْدَةَ بْنَ عَبْدِ اللَّهِ يُحَدِّثُ قَالَ قَالَ عَبْدُ اللَّهِ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّ النُّطْفَةَ تَكُونُ فِي الرَّحِمِ أَرْبَعِينَ يَوْمًا عَلَى حَالِهَا لَا تَغَيَّرُ فَإِذَا مَضَتْ الْأَرْبَعُونَ صَارَتْ عَلَقَةً ثُمَّ مُضْغَةً كَذَلِكَ ثُمَّ عِظَامًا كَذَلِكَ فَإِذَا أَرَادَ اللَّهُ أَنْ يُسَوِّيَ خَلْقَهُ بَعَثَ إِلَيْهَا مَلَكًا فَيَقُولُ الْمَلَكُ الَّذِي يَلِيهِ أَيْ رَبِّ أَذَكَرٌ أَمْ أُنْثَى أَشَقِيٌّ أَمْ سَعِيدٌ أَقَصِيرٌ أَمْ طَوِيلٌ أَنَاقِصٌ أَمْ زَائِدٌ قُوتُهُ وَأَجَلُهُ أَصَحِيحٌ أَمْ سَقِيمٌ قَالَ فَيَكْتُبُ ذَلِكَ كُلَّهُ فَقَالَ رَجُلٌ مِنْ الْقَوْمِ فَفِيمَ الْعَمَلُ إِذَنْ وَقَدْ فُرِغَ مِنْ هَذَا كُلِّهِ قَالَ اعْمَلُوا فَكُلٌّ سَيُوَجَّهُ لِمَا خُلِقَ لَهُ
مسند امام احمد بن حنبل · Hadith 3553
Abu ' Ubaidah bin 'Abdullah narrated: 'Abdullah said: The Messenger of Allah (PBUH) said: "The nutfah (sperm drop) remains in the uterus for forty days as it is without changing. Then when forty days have passed, it becomes an ’alaqah (blood clot), then a mudghalt (chewed lump of flesh) for a similar length of time, then it becomes bones for a similar length of time. Then when Allah wants to give it its final shape, He sends an angel to it and the angel who is appointed in charge of it says: 'O Lord, male or female? Doomed or blessed? Short or tall? With something missing or something superfluous? (What is) its provision and life span? Healthy or sick?' And he writes down all of that." One of the people said: Then why should we strive if all of that is finished with? He said: "Strive, for each one will be helped to do that for which he was created."
Sanad
حَدَّثَنَا هُشَيْمٌ أَنْبَأَنَا عَلِيُّ بْنُ زَيْدٍ قَالَ سَمِعْتُ أَبَا عُبَيْدَةَ بْنَ عَبْدِ اللَّهِ