Jami` at-Tirmidhi 2394
جامع الترمذي#2394Sahihحَدَّثَنَا مُحَمَّدُ بْنُ عُثْمَانَ الْكُوفِيُّ، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ سَالِمٍ الْخَيَّاطِ، عَنِ الْحَسَنِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ أَمَرَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ نَحْثُوَ فِي أَفْوَاهِ الْمَدَّاحِينَ التُّرَابَ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ غَرِيبٌ مِنْ حَدِيثِ أَبِي هُرَيْرَةَ .
Abu Hurairah narrated:"The Messenger of Allah(s.a.w) ordered us to throw dut in the mouths of those who praise others
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:
Ahmad Muhammad ShakirSahih Lighairihi
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 36:92