And Abu Bakr ibn Abi Shaybah narrated to us, saying: Abdullah ibn al-Mubarak narrated to us. (Another chain:) And Abu Kurayb, Muhammad ibn al-'Ala', narrated to us — and the wording is his — saying: Ibn al-Mubarak informed us, from Ma'mar, from al-Zuhri, from Sa'id ibn al-Musayyab, from Sa'd ibn Abi Waqqas, who said: The Messenger of Allah, peace and blessings be upon him, forbade 'Uthman ibn Maz'un from celibacy (al-tabattul). And had he permitted it to him, we would have castrated ourselves.