Mishkat al-Masabih
Mishkat al-Masabih 88
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي رَجُلٌ شَابٌّ وَأَنَا أَخَافُ عَلَى نَفْسِي الْعَنَتَ وَلَا أَجِدُ مَا أَتَزَوَّجُ بِهِ النِّسَاءَ كأَنَّهُ يَسْتَأْذِنُهُ فِي الِاخْتِصَاءِ قَالَ: فَسَكَتَ عَنِّي ثُمَّ قُلْتُ مِثْلَ ذَلِكَ فَسَكَتَ عَنِّي ثُمَّ قُلْتُ مِثْلَ ذَلِكَ فَسَكَتَ عَنِّي ثُمَّ قُلْتُ مِثْلَ ذَلِكَ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «يَا أَبَا هُرَيْرَةَ جَفَّ الْقَلَمُ بِمَا أَنْتَ لَاقٍ فَاخْتَصِ على ذَلِك أَو ذَر» . رَوَاهُ البُخَارِيّ
Abu Hurayra said: I told the Messenger of God, “I am a young man and fear hardship for myself, but I have no means to marry women.” It was as though he was asking permission to be castrated. He remained silent. Then I said the same again, and he remained silent. Then I said the same again, and he remained silent. Then I said it once more, and the Prophet said, “Abu Hurayra, the pen has dried with what you are destined to encounter. So castrate yourself on that account, or leave it.” Bukhari transmitted it.