The Book of Clothes and Adornment
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، وَعَبْدِ اللَّهِ بْنِ دِينَارٍ، وَزَيْدِ، بْنِ أَسْلَمَ كُلُّهُمْ يُخْبِرُهُ عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يَنْظُرُ اللَّهُ إِلَى مَنْ جَرَّ ثَوْبَهُ خُيَلاَءَ " .Ibn 'Umar reported Allah's Messenger (ﷺ) having said:Allah will not look upon him who trails his garment out of pride
From Sahih Muslim, whose reports the scholars accept as authentic.