(20) باب مَا جَاءَ فِي الْخِضَابِ
Narrated Abu Dharr:
That the Prophet (ﷺ) said: "Indeed the best of what the gray may be changed with is Henna' and Katam."[Abu 'Eisa said:] This Hadith is Hasan Sahih. Abu Al-Aswad Ad-Dili's (a narrator in this chain) name is Zalim bin 'Amr bin Sufyan.
Reference: Jami` at-Tirmidhi 1753
In-book reference: Book 24, Hadith 34
English translation: Vol. 3, Book 22, Hadith 1753