Al-Kāfi

Hadith 554
washing-deceasedprophet-muhammad
2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنْ أَبِي جَمِيلَةَ عَنْ جَابِرٍ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلام) قَالَ قَالَ رَسُولُ الله (صلّى اللهُ عَلَيْهِ وَآلِه) لَيْسَ مِنْ لِبَاسِكُمْ شَيْ‏ءٌ أَحْسَنَ مِنَ الْبَيَاضِ فَأَلْبِسُوهُ مَوْتَاكُمْ.
2. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from ibn abu Nasr from abu Jamilah from Jabir who has said the following: “Abu Ja‘far (a.s.), has said, ‘The Messenger of Allah has said, ‘In your dresses the best is white. Dress up with them your deceased ones also.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī