Hadith 37:46
Anas reported that Allah's Messenger (ﷺ) granted concession, or Zubair b. Awwam and 'Abd Al-Rahman b. Auf were granted concession, for the wearing of silk because of the itch that they both had.
وَحَدَّثَنَاهُ أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا وَكِيعٌ، عَنْ شُعْبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ رَخَّصَ رَسُولُ اللَّهِ صلى الله عليه وسلم - أَوْ رُخِّصَ - لِلزُّبَيْرِ بْنِ الْعَوَّامِ وَعَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ فِي لُبْسِ الْحَرِيرِ لِحِكَّةٍ كَانَتْ بِهِمَا
Original Reference: Sahih Muslim 2076 c