It wasnarrated that Humaid said:
"Anas bin Malik was asked: 'Did theMessenger of Allah (ﷺ) dye his hair?' He said: 'He did not haveanywhite hair apart from approximately seventeen or twenty hairs atthefront of his beard.'" (PT)
English reference (PT): Vol. 4, Book 32, Hadith 3629 (PT)
Arabic reference (PT): Book 32, Hadith 3760 (PT)