Sahih al-Bukhari 375
Sahih al-Bukhari · Book 8: Prayers (Salat) · Whoever offered Salat (prayer)in a silk Farruj (an outer garment opened at the back) and then took it off.
Narrated `Uqba bin 'Amir:
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ ، قَالَ حَدَّثَنَا اللَّيْثُ ، عَنْ يَزِيدَ ، عَنْ أَبِي الْخَيْرِ ، عَنْ عُقْبَةَ بْنِ عَامِرٍ ، قَالَ أُهْدِيَ إِلَى النَّبِيِّ صلى الله عليه وسلم فَرُّوجُ حَرِيرٍ، فَلَبِسَهُ فَصَلَّى فِيهِ، ثُمَّ انْصَرَفَ فَنَزَعَهُ نَزْعًا شَدِيدًا كَالْكَارِهِ لَهُ وَقَالَ " لاَ يَنْبَغِي هَذَا لِلْمُتَّقِينَ " .
The Prophet (ﷺ) was given a silken Farruj [??] as a present. He wore it while praying. When he had finished his prayer, he took it off violently as if with a strong aversion to it and said, "It is not the dress of Allah-fearing pious people."