Sunan an-Nasa'i, Hadith 3212 ⓘ
Narrated Sa'd bin Abi Waqqas: It was narrated that Sa'd bin Abi Waqqas said: "The Messenger of Allah forbade 'Uthman to be celibate. If he had given him permission we would have castrated ourselves."
أَخْبَرَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ، عَنْ مَعْمَرٍ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ سَعْدِ بْنِ أَبِي وَقَّاصٍ، قَالَ لَقَدْ رَدَّ رَسُولُ اللَّهِ صلى الله عليه وسلم عَلَى عُثْمَانَ التَّبَتُّلَ وَلَوْ أَذِنَ لَهُ لاَخْتَصَيْنَا .
also referenced under: Book 26, Hadith 17 (In-Book) & Volume 4, Book 26, Hadith 3214 (DarusSalam)