كتاب اللباس والزينة
37  
The Book of Clothes and Adornment
(9)
Chapter: The Prohibition Of Letting One's Garment Drag Out Of Pride, And The Extent To Which It Is Permissible To Let It Hang Down And The Extent To Which It Is Recommended
(9)
باب تَحْرِيمِ جَرِّ الثَّوْبِ خُيَلاَءَ وَبَيَانِ حَدِّ مَا يَجُوزُ إِرْخَاؤُهُ إِلَيْهِ وَمَا يُسْتَحَبّ
Sahih Muslim 2085 f

Salim reported:

I heard Ibn Umar as saying that he had heard Allah's Messenger (ﷺ) as saying like this (as mentioned above) but with a slight variation of wording [that instead of the word thaub (cloth) there is the word thiyab (the clothes) ].
وَحَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا إِسْحَاقُ بْنُ سُلَيْمَانَ، حَدَّثَنَا حَنْظَلَةُ بْنُ أَبِي سُفْيَانَ، قَالَ سَمِعْتُ سَالِمًا، قَالَ سَمِعْتُ ابْنَ عُمَرَ، يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏.‏ مِثْلَهُ غَيْرَ أَنَّهُ قَالَ ثِيَابَهُ ‏.‏
Reference : Sahih Muslim 2085f
In-book reference : Book 37, Hadith 73
USC-MSA web (English) reference : Book 24, Hadith 5196
  (deprecated numbering scheme)