Sahih al-Bukhari 2919
Book 56: Fighting for the Cause of Allah (Jihaad) · Narrated by Anas
Arabic
حَدَّثَنَا أَحْمَدُ بْنُ الْمِقْدَامِ، حَدَّثَنَا خَالِدٌ، حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، أَنَّ أَنَسًا، حَدَّثَهُمْ أَنَّ النَّبِيَّ صلى الله عليه وسلم رَخَّصَ لِعَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ وَالزُّبَيْرِ فِي قَمِيصٍ مِنْ حَرِيرٍ، مِنْ حِكَّةٍ كَانَتْ بِهِمَا.
English translation
Narrated Anas:The Prophet (ﷺ) allowed `Abdur-Rahman bin `Auf and Az-Zubair to wear silken shirts because they had a skin disease causing itching
Reference: Sahih al-Bukhari 2919, Book of Fighting for the Cause of Allah (Jihaad). English translation by Dr. Muhammad Muhsin Khan.