I have preserved from the Messenger of Allah ﷺ two containers of knowledge. As for one of them, I have spread it. As for the other, if I were to spread it, this throat would be cut.
حفظت من رسول الله ﷺ وعاءين: فأما أحدهما فبثثته، وأما الآخر فلو بثته قطع هذا البلعوم.
Bukhari narrated it in the Book of Knowledge (120) from Ismail, who said, "My brother told me, from Ibn Abu Dhib, from Saeed Maqburi, from Abu Hurairah," and he mentioned it.