(66) باب مَا يُذْكَرُ فِي الشَّيْبِ
Narrated Thabit:
Anas was asked whether the Prophet (ﷺ) used a a hair dye or not. He replied, "The Prophet (ﷺ) did not have enough grey hair to dye, (such that) if I wanted to count the fading hairs in his beard (I could have)."
Reference: Sahih al-Bukhari 5895
In-book reference: Book 77, Hadith 112
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 72, Hadith 783