PUNISHMENT FOR CONCEALING KNOWLEDGE H 1419 "Whosoever is asked about knowledge and conceals it will be bridled with a bridle of Fire on the Day of Judgement." R 1419 Abu Daud and Tirmidhi with a chain up to Abu Hurairah who related that the Messenger of Allah, praise and peace be upon him, said this.
1390- وعن أَبي هريرة رضي الله عنه قَالَ : قَالَ رسول الله صلى الله عليه وآله وسلم : "مَنْ سُئِلَ عن عِلْمٍ فَكَتَمَهُ ، أُلْجِمَ يَوْمَ القِيَامَةِ بِلِجَامٍ مِنْ نَارٍ" . رواه أَبُو داود والترمذي ، وقال : "حديث حسن" .