وعن أبي هريرة رضي الله عنه
أن رسول الله صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قال: «إن اليهود والنصارى لا يصبغون، فخالفوهم»
I heard the Messenger of Allah (sallallahu alayhi wa sallam) as saying: “Jews and Christians do not dye their hair, so act differently from them.”.
Riyad as-Salihin 1636, Book 18, The Book of the Prohibited actions, Hadith 126. 1 min read