Jami` at-Tirmidhi 2649
جامع الترمذي#2649Sahihحَدَّثَنَا أَحْمَدُ بْنُ بُدَيْلِ بْنِ قُرَيْشٍ الْيَامِيُّ الْكُوفِيُّ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ عُمَارَةَ بْنِ زَاذَانَ، عَنْ عَلِيِّ بْنِ الْحَكَمِ، عَنْ عَطَاءٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ سُئِلَ عَنْ عِلْمٍ عَلِمَهُ ثُمَّ كَتَمَهُ أُلْجِمَ يَوْمَ الْقِيَامَةِ بِلِجَامٍ مِنْ نَارٍ " . وَفِي الْبَابِ عَنْ جَابِرٍ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو . قَالَ أَبُو عِيسَى حَدِيثُ أَبِي هُرَيْرَةَ حَدِيثٌ حَسَنٌ .
Narrated Abu Hurairah:that the Messenger of Allah (ﷺ) said: "Whoever is asked about some knowledge that he knows, then he conceals it, he will be bridled with bridle of fire
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 41:5