Volume 6, Book 60, Number 145:
Narrated Anas:
The Prophet 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 com –
panions of the Prophet covered their faces and the sound of their weeping was heard. A man said,
“Who is my father?” The Prophet said, “So-and-so.” So this Verse was revealed: “Ask not about things
which, if made plain to you, may cause you trouble.” (5.101)