أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا عِيسَى بْنُ يُونُسَ، قَالَ حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَرْخَصَ لِعَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ وَالزُّبَيْرِ بْنِ الْعَوَّامِ فِي قُمُصِ حَرِيرٍ مِنْ حِكَّةٍ كَانَتْ بِهِمَا ‏.‏

It was narrated from Anas that: The Messenger of Allah [SAW] granted a concession to 'Abdur-Rahman bin 'Awf and Az-Zubair bin Al-'Awwam allowing them to wear silken shirts because of scabies that they were suffering from. Translation Not Available

Book Ref: Sunan An Nisai Book 48 Hadith 5310
Web Ref:  Sunan An Nisai Vol 6 Book 48 Hadith 5312