Al-Kāfi - Volume 6 > The Cotton White Dress
Hadith #4

مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْقَاسِمِ بْنِ يَحْيَى عَنْ جَدِّهِ الْحَسَنِ بْنِ رَاشِدٍ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ ( عليه السلام ) الْبَسُوا ثِيَابَ الْقُطْنِ فَإِنَّهَا لِبَاسُ رَسُولِ اللَّهِ ( صلى الله عليه وآله ) وَ هُوَ لِبَاسُنَا .

4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Qasim ibn Yahya from his grandfather al-Hassan ibn Rashid f, abu Basir who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that ’Amir al-Mu’minin has said, ‘You must wear cotton clothes because it is the clothes of the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, and our clothes.”’