The Prophet [SAW] granted a concession to 'Abdur-Rahman and Az-Zubair to wear silken shirts because of scabies that they were suffering from.
أَنَّ النَّبِيَّ ﷺ رَخَّصَ لِعَبْدِ الرَّحْمَنِ وَالزُّبَيْرِ فِي قُمُصِ حَرِيرٍ كَانَتْ بِهِمَا يَعْنِي لِحِكَّةٍ