Abbas bin 'Abdul 'Azeem al-'Anbari عباس بن عبد العظيم العنبري · The Book of Adornment

The Messenger of Allah did not dye his hair; his gray hair were only a little beneath his lower lip and at his temples, and a little on his head.

"I bear witness that 'Imran narrated to us, he said: 'The Messenger of Allah forbade wearing silk, and gold rings, and drinking from Al-Hanatim.'"

"The Messenger of Allah forbade me from wearing gold rings, and from garments of Al-Qassi, and garments dyed with safflower, and reciting Qur'an while bowing."