Mishkat al-Masabih 22 Clothing كتاب اللباس 14

وَعَنِ ابْنِ عُمَرَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّمَا يَلْبَسُ الْحَرِيرَ فِي الدُّنْيَا مَنْ لَا خَلَاقَ لَهُ فِي الْآخِرَة»

Ibn ‘Umar reported God’s messenger as saying, “Only he who has no portion in the next world wears silk in this world.” (Bukhari and Muslim.)