We were with ʿUtbah bin Farqad and ʿUmar ؓ wrote to him about things he narrated from the Prophet ﷺ. Among the things he wrote was that the Messenger of Allah ﷺ said: ʿNo one wears silk in this world except one who will not wear it in the Hereafter, except this much,ʿ and he gestured with his two fingers, the forefinger and the middle finger. Abu ʿUthman said: I thought this referred to the edging of the tayalisah (a shawl-like garment) when we first saw the tayalisah.
يُحَدِّثُهُ عَنِ النَّبِيِّ ﷺ فَكَانَ فِيمَا كَتَبَ إِلَيْهِ أَنَّ رَسُولَ اللهِ ﷺ قَالَ لَا يَلْبَسُ الْحَرِيرَ فِي الدُّنْيَا إِلَّا مَنْ لَيْسَ لَهُ فِي الْآخِرَةِ مِنْهُ شَيْءٌ إِلَّا هَكَذَا وَقَالَ بِإِصْبَعَيْهِ السَّبَّابَةِ وَالْوُسْطَى قَالَ أَبُو عُثْمَانَ فَرَأَيْتُ أَنَّهَا أَزْرَارُ الطَّيَالِسَةِ حِينَ رَأَيْنَا الطَّيَالِسَةَ