Chapter on Touching the Deceased
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 25
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «اَلْكَتَّانُ كَانَ لِبَنِي إِسْرَائِيلَ يُكَفَّنُونَ بِهِ وَ اَلْقُطْنُ لِأُمَّةِ مُحَمَّدٍ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ.
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said: "Linen (الكتان) was used by the Children of Israel for shrouding, while cotton (القطن) is for the Ummah (community) of Muhammad."
- Ṣaḥīḥ al-Faqīh