(9) باب كَرَاهِيَةِ مَنْعِ الْعِلْمِ
Narrated AbuHurayrah:
The Prophet (ﷺ) said: He who is asked something he knows and conceals it will have a bridle of fire put on him on the Day of Resurrection.
Reference: Sunan Abi Dawud 3658
In-book reference: Book 26, Hadith 18
English translation: Book 25, Hadith 3650