Thabit reported that Anas b. Malik was asked about the dyeing (of the hair of) Allah's Apostle (ﷺ). Thereupon he said.:
(They were so few) that if I so liked I could count their number in his head, and he further said: (That is) he did not dye. Abu Bakr, however, dyed them and so did 'Umar dye them with pure henna.
Reference: Sahih Muslim 2341 d In-book : Book 43, Hadith 134 USC-MSA web (English) : Book 30, Hadith 5782 (deprecated)
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