Language:
كتاب الأدب
78  
Good Manners and Form (Al-Adab)
(55)
Chapter: Whoever praises his brother with that he knows
(55)
باب مَنْ أَثْنَى عَلَى أَخِيهِ بِمَا يَعْلَمُ
Sahih al-Bukhari 6062

Narrated Salim:

that his father said; "When Allah's Messenger (ﷺ) mentioned what he mentioned about (the hanging of) the Izar (waist sheet), Abu Bakr said, "O Allah's Messenger (ﷺ)! My Izar slackens on one side (without my intention)." The Prophet (ﷺ) said, "You are not among those (who, out of pride) drag their Izars behind them."

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، حَدَّثَنَا مُوسَى بْنُ عُقْبَةَ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم حِينَ ذَكَرَ فِي الإِزَارِ مَا ذَكَرَ، قَالَ أَبُو بَكْرٍ يَا رَسُولَ اللَّهِ إِنَّ إِزَارِي يَسْقُطُ مِنْ أَحَدِ شِقَّيْهِ‏.‏ قَالَ ‏ "‏ إِنَّكَ لَسْتَ مِنْهُمْ ‏"‏‏.‏
Reference : Sahih al-Bukhari 6062
In-book reference : Book 78, Hadith 92
USC-MSA web (English) reference : Vol. 8, Book 73, Hadith 88
  (deprecated numbering scheme)