(3) باب إِبَاحَةِ لُبْسِ الْحَرِيرِ لِلرَّجُلِ إِذَا كَانَ بِهِ حِكَّةٌ أَوْ نَحْوُهَا
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.
Reference: Sahih Muslim 2076 c
In-book reference: Book 37, Hadith 46
USC-MSA web (English) reference(deprecated numbering scheme): Book 24, Hadith 5170