Sunan Abi Dawud — Purification (Kitab Al-Taharah) — Hadith No: 25

Narrated AbuDharr: The Prophet (ﷺ) said: The best things with which grey hair are changed are henna and katam

The tradition mentioned above has also been transmitted by Anas through a different chain of narrators. This version as transmitted by 'Isa b. Yunus adds:It remained in his hand until he died, in the hand of 'Abu Bakr until he died, in the hand of 'Umar until he died, and in the hand of 'Uthman. When he was near a well, it fell down in it. He ordered to take it out, but it could not be found

Narrated AbuRimthah: I went with my father to the Prophet (ﷺ). He had locks hanging down as far as the lobes of the ears stained with henna, and he was wearing two green garments

Narrated Ibn 'Umar: The Messenger of Allah (ﷺ) took a signet-ring of gold, and put the stone next the palm of his hand. He engraved on it "Muhammad, the Messenger of Allah". The people then took signet-rings of gold. When he saw that they had taken them (like his ring) he threw it away and said: I shall never wear it. He then fashioned a silver ring and engraved on it "Muhammad, the Messenger of Allah". Then Abu Bakr wore it after him, then 'Umar wore it after Abu Bakr, and the 'Uthman wore it after 'Umar till it fell down in a well called Aris. Abu Dawud said: The people did not disagree on 'Uthman till the signet-rin fell down from his hand