´It was narrated from Anas that:` The Messenger of Allah [SAW] did not dye his hair; his gray hair were only a little beneath his lower lip and at his temples, and a little on his head.
Hadith ReferenceSunan an-Nasa'i / The Book of Adornment / Hadith: 5090
Hadith Gradingالألبانی:صحيح الإسناد | زبیر علی زئی:صحيح مسلم