Anas bin Malik reported,

He informed them that the Messenger of Allah ﷺ "granted Abdul-Rahman bin Awf and Zubayr bin Awwam permission to wear silk shirts while traveling, because of an itch they suffered from, or a pain they had."

Muslim 5430

Sahih

و حدثناه أبو بكر بن أبي شيبة حدثنا محمد بن بشر حدثنا سعيد بهذا الإسناد ولم يذكر في السفر

مسلم 5430صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Clothing and adornment
Chapter
Permissibility of wearing silk for men if they have an itch or similar condition
Numbering
Darussalam 5430
Muslim 5430