Jami` at-Tirmidhi 3854
جامع الترمذي#3854Sahihحَدَّثَنَا عَبْدُ اللَّهِ بْنُ أَبِي زِيَادٍ، قَالَ حَدَّثَنَا سَيَّارٌ، قَالَ حَدَّثَنَا جَعْفَرُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا ثَابِتٌ، وَعَلِيُّ بْنُ زَيْدٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " كَمْ مِنْ أَشْعَثَ أَغْبَرَ ذِي طِمْرَيْنِ لاَ يُؤْبَهُ لَهُ لَوْ أَقْسَمَ عَلَى اللَّهِ لأَبَرَّهُ مِنْهُمُ الْبَرَاءُ بْنُ مَالِكٍ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ مِنْ هَذَا الْوَجْهِ .
Narrated Anas bin Malik:that the Messenger of Allah (ﷺ) said: "How many are there with dishevelled hair, covered with dust, possessing two cloths, whom no one pays any mind to - if he swears by Allah then He shall fulfill it. Among them is Al-Bara bin Malik
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: 49:254