Sahih al-Bukhari
Sahih al-Bukhari 375
Whoever offered Salat (prayer)in a silk Farruj (an outer garment opened at the back) and then took it off.
Arabic hadith text
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 "
Translation
Narrated `Uqba bin 'Amir
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."