The Messengger of Allah (ﷺ) rejected (the idea) of Uthman b. Muz'unliving in celibacy (saying): And if he (the Holy Prophet) had given me permission We would have got ourselves castrated.
Sahih Muslim Book 16, Hadith 7
← Previous Hadith I will not marry women; someone among them said: I will not eat meat; and someone among them said: I will not lie down in bed. He (the Holy Prophet) praised Allah and glorified Him, and said: What has happened to these people that they say so and so, whereas I observe prayer and sleep too; I observe fast and suspend observing them; I marry women also? And he who turns away from my Sunnah, he has no relation with Me

Sahih Muslim Book 16, Hadith 6 Next Hadith → I heard Sa'd (b. Abi Waqqas) saying that the idea of 'Uthman b. Maz'un for living in celibacy was rejected (by the Holy Prophet), and if he had been given permission they would have got themselves castrated.

Sahih Muslim Book 16, Hadith 8