Al-Kāfi

Hadith 1887
dress-adornment
الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ عَنْ مُثَنًّى الْحَنَّاطِ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ قَالَ رَسُولُ اللَّهِ ( صلى الله عليه وآله ) الْبَسُوا الْبَيَاضَ فَإِنَّهُ أَطْيَبُ وَ أَطْهَرُ وَ كَفِّنُوا فِيهِ مَوْتَاكُمْ .
2. Al-Husayn ibn Muhammad has narrated from Mu‘alla’ ibn Muhammad from al-Hassan ibn Ali from Muthanna’ al-Hannat who has said the following: “Abu ‘Abd Allah (a.s.), has said that the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has said, ‘You must wear white; it is fine and pure; and shroud your dead people with it.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī