Sahih Muslim Book 30, Hadith Number 5824.

Chapter : Respect of Allah’s Messenger and abandoning of too many questions especially those for which there is no genuine need.

Anas b. Malik reported that a person said: Allah’s Messenger, who is my father? And he said: Your father is so and so, and there was revealed this verse: “Do not ask about matters which, if they were to be made manifest to you, might cause you harm” (v. 101).