Whoever offered Salat (prayer)in a silk Farruj (an outer garment opened at the back) and then took it off.

Narrated 'Uqba bin 'Amir:

The Prophet 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."

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ يَزِيدَ، عَنْ أَبِي الْخَيْرِ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، قَالَ أُهْدِيَ إِلَى النَّبِيِّ ﷺ فَرُّوجُ حَرِيرٍ، فَلَبِسَهُ فَصَلَّى فِيهِ، ثُمَّ انْصَرَفَ فَنَزَعَهُ نَزْعًا شَدِيدًا كَالْكَارِهِ لَهُ وَقَالَ " لاَ يَنْبَغِي هَذَا لِلْمُتَّقِينَ ".