(3) باب إِبَاحَةِ لُبْسِ الْحَرِيرِ لِلرَّجُلِ إِذَا كَانَ بِهِ حِكَّةٌ أَوْ نَحْوُهَا
Anas b. Malik reported that 'Abd al-Rahman b. Auf and Zu'bair. b. 'Awwam complained to Allah's Messenger (ﷺ) about lice; he granted them concession to wear shirts of silk.
Reference: Sahih Muslim 2076 e
In-book reference: Book 37, Hadith 48
USC-MSA web (English) reference(deprecated numbering scheme): Book 24, Hadith 5172