Sunan Ibn Majah, Volume 4, Book 32, Hadith 3592 (DarusSalam) ⓘ
It was narrated from Anas bin Malik that the Messenger of Allah granted a concession to Zubair bin ‘Awwam and ‘Abdur-Rahman bin ‘Auf, allowing them to wear silk shirts, because of a rash they were suffering from.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا مُحَمَّدُ بْنُ بِشْرٍ، حَدَّثَنَا سَعِيدُ بْنُ أَبِي عَرُوبَةَ، عَنْ قَتَادَةَ، . أَنَّ أَنَسَ بْنَ مَالِكٍ، نَبَّأَهُمْ أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ رَخَّصَ لِلزُّبَيْرِ بْنِ الْعَوَّامِ وَلِعَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ فِي قَمِيصَيْنِ مِنْ حَرِيرٍ مِنْ وَجَعٍ كَانَ بِهِمَا حِكَّةٍ .
also referenced under: Hadith 3592 (Reference) & Book 32, Hadith 3723 (In-Book)