Ibn Sirin reported:Anas b. Malik was asked whether Allah's Messenger (ﷺ) dyed his hair. He said: He had not become old enough to have white hair. Ibn Idris said that he had a few white hair. Abu Bakr and Umar, however, dyed hair with hina' (henna)

Ibn Sirin reported:I asked Anas b. Malik whether Allah's Messenger (ﷺ) dyed his hair. He said: He had not reached the stage when (he needed) dyeing (of his white hair). He had a few white hair in his beard. I said to him: Did Abu Bakr dye his hair? He said: Yes, with hina' (henna)

Muhammad b. Sirin reported:I asked Anas b. Malik whether Allah's Messenger (ﷺ) dyed his hair. He said: He had but little white hair

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

Anas b. Malik did not like that a person should pick out his white hair from his head or beard, and Allah's Messenger (ﷺ) did not dye, and there was some whiteness in his hair at his chin, on his temples and very little on his head

This hadith has been narrated on the authority of Muthanna through the same chain of transmitters

Anas (b. Malik) was asked about the old age of Allah's Apostle (ﷺ). He said:Allah did not blemish him with white hair