حَدَّثَنَا النُّفَيْلِيُّ، حَدَّثَنَا عِيسَى، - يَعْنِي ابْنَ يُونُسَ - عَنْ سَعِيدِ بْنِ أَبِي عَرُوبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ رَخَّصَ رَسُولُ اللَّهِ صلى الله عليه وسلم لِعَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ وَلِلزُّبَيْرِ بْنِ الْعَوَّامِ فِي قُمُصِ الْحَرِيرِ فِي السَّفَرِ مِنْ حِكَّةٍ كَانَتْ بِهِمَا ‏.‏

Narrated Anas: The Messenger of Allah (PBUH) 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. Translation Not Available

Book Ref: Sunan Abi Dawud Book 34 Hadith 4056
Web Ref:  Sunan Abi Dawud Book 33 Hadith 4045