Sahih Bukhari

Narrated Anas:The Prophet (ﷺ) delivered a sermon the like of which I had never heard before. He said, ""If you but knew what I know then you would have laughed little and wept much."" On hearing that, the companions of the Prophet (ﷺ) covered their faces and the sound of their weeping was heard. A man said, ""Who is my father?"" The Prophet (ﷺ) said, ""So-and-so."" So this Verse was revealed: ""Ask not about things which, if made plain to you, may cause you trouble