رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 780
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 الْبَرَاءَ رضى اللَّه عَنْهُ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ مربوعاً، ولقد رَأَيْتُهُ فِي حُلَّةٍ حَمْرَاءَ مَا رَأَيْتُ شَيْئًا قط أحسن منه.((مُتَّفَقٌ عَلَيْهِ))
Bara' (May Allah be pleased with him) reported: Messenger of Allah (ﷺ) was of medium stature. I saw him wearing a red mantle. I have never seen anything more graceful than that. [Al-Bukhari and Muslim].
Riyad as-Salihin, 780