Imam Al-Nawawi’s Riyad-us-Saliheen
Prohibition of Wearing Saffron-Colored Dress
1798. Anas (May Allah be pleased with him) said: The Prophet (sallallaahu alayhi wa sallam) prohibited men from wearing saffron-dyed clothes.
[Al-Bukhari and Muslim].
1799. `Abdullah bin `Amr bin Al-`As (May Allah be pleased with them) said: The Prophet (sallallaahu alayhi wa sallam) saw me dressed in two saffron-coloured garments and asked, “Has your mother commanded you to wear these?” I asked him, “Shall I wash them out?” He replied, “You had better set them to fire.”
Another narration is: “These are garments of the disbelievers. So do not wear them.”