Mishkat al-Masabih #213
Knowledge
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «من سُئِلَ عَنْ عِلْمٍ عَلِمَهُ ثُمَّ كَتَمَهُ أُلْجِمَ يَوْمَ الْقِيَامَةِ بِلِجَامٍ مِنْ نَارٍ» . رَوَاهُ أَحْمَدُ وَأَبُو دَاوُد وَالتِّرْمِذِيّ
وَرَوَاهُ ابْن مَاجَه عَن أنس
Abu Huraira reported God’s messenger as saying, “He who is
asked about something he knows and conceals it will have a bridle of fire
put on him on the day of resurrection.” Ahmad, Abu Dawud and
Tirmidhi transmitted it, and Ibn Majah transmitted it from Anas.
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About Mishkat al-Masabih
This hadith is #213 from Mishkat al-Masabih, in the Book of Knowledge.