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.'" (ID)
English reference (ID): Vol. 4, Book 32, Hadith 3629 (ID)
Arabic reference (ID): Book 32, Hadith 3760 (ID)