The Messenger of Allah (ﷺ) gave license to 'Abd al-Rahman b. 'Awf and al-Zubair b. al-'Awwam to wear silk shirts during a journey because of an itch which they had.
Reference: Sunan Abi Dawud 4056 In-book : Book 34, Hadith 37 English translation : Book 33, Hadith 4045
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