(3) باب إِبَاحَةِ لُبْسِ الْحَرِيرِ لِلرَّجُلِ إِذَا كَانَ بِهِ حِكَّةٌ أَوْ نَحْوُهَا
Anas b. Malik reported to them (his companions) that Allah's Messnger (ﷺ) had granted concession to Abd al-Rahman b. *Anf and Zubair b. 'Awwam for the wearing of a silk shirt during the journey and because of itch which they both had or any other disease from which both of them had been suffering.
Reference: Sahih Muslim 2076 a
In-book reference: Book 37, Hadith 44
USC-MSA web (English) reference(deprecated numbering scheme): Book 24, Hadith 5168