Why did the Prophet (peace and blessings be upon him) turn Uthman ibn Maz'un away from seclusion and prevent him from abandoning marriage?

Question:
May Allah reward you. Honorable Shaykh, a questioner asks: What is the meaning of this report from Sa'd ibn Abi Waqqas that the Messenger of Allah (peace and blessings be upon him) turned Uthman ibn Maz'un away from seclusion, and if he had accepted it, we would have castrated ourselves?

Answer:
Yes. It means that Uthman ibn Maz'un intended not to marry; seclusion means abandoning marriage. Allah has forbidden abandoning marriage. A person marries for various benefits, so he should not deprive himself of marriage. Is it because he is worshipping Allah and there is reward in it? No. The Prophet (peace and blessings be upon him) turned Uthman ibn Maz'un (may Allah be pleased with him) away when he wanted to practice seclusion and prevented him from doing so. If the Messenger had permitted this, the Companion said, we would have castrated ourselves, meaning we would have done what cuts off our desire.