It was narrated from Ibn ‘Abbas that the Messenger of Allah ﷺ said:
“The best of your garments are those which are white, so shroud your dead in them, and wear them.”

حَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ، أَنْبَأَنَا عَبْدُ اللَّهِ بْنُ رَجَاءٍ الْمَكِّيُّ، عَنْ عَبْدِ اللَّهِ بْنِ عُثْمَانَ بْنِ خُثَيْمٍ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " خَيْرُ ثِيَابِكُمُ الْبَيَاضُ فَكَفِّنُوا فِيهَا مَوْتَاكُمْ وَالْبَسُوهَا " .