Mukhtasar Muslim

The conqueror of Persia, Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) says: When 'Uthman bin Maz'un (may Allah be pleased with him) intended to abstain from women, the Messenger of Allah (peace and blessings be upon him) forbade him. And if the Prophet (peace and blessings be upon him) had permitted him, then we (all) would have become eunuchs.