رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 779
The Book of Dress
The Excellence of Wearing White Clothes and the Permissibility of Wearing Red, Green, Yellow and Black Clothes Made from Cotton and Linen but not Silk
وَعَنْ سَمُرَةَ رضى اللَّه عَنْهُ قَالَ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ : إلبسوا الْبَيَاضَ؛ فَإِنَّهَا أَطْهَرُ وَأَطْيَبُ، وَكَفِّنُوا فِيهَا مَوْتَاكُمْ . ((رَوَاهُ النسائي والحاكم))
Samurah (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, 'Wear white clothes because they are the purest and they are closest to modesty; and shroud the dead in it." [An- Nasa'i and Al-Hakim].
Riyad as-Salihin, 779