In some hadiths, it is stated that the beard of the Prophet (peace and blessings be upon him) had a few white hairs, so how does one dye it?

The questioner : Shaykh, may Allah bless you, it is mentioned in some hadiths that the beard of the Prophet (peace and blessings be upon him) was black with a few white hairs, so how did the Prophet (peace and blessings be upon him) dye it when his beard was black?

The Shaykh : It appears that this is what necessitated investigating this matter, because the dyeing might have been on something other than the beard. Otherwise, Anas ibn Malik said: And what is reported in some narrations is that he dyed it. Some scholars said that the Prophet (peace and blessings be upon him) used to use a lot of perfume, and his hair changed color because of that, or the one who saw him had just applied perfume and thought he was dyeing it.