He heard ʿUmar bin al-Khattab delivering a khutbah, He [ʼUmar] said: The Messenger of Allah ﷺ said: “Whoever wears silk in this world will not wear it in the Hereafter.”
قَالَ رَسُولُ اللهِ ﷺ مَنْ لَبِسَ الْحَرِيرَ فِي الدُّنْيَا فَلا يُكْسَاهُ فِي الْآخِرَةِ