The Messenger of Allah (ﷺ) was using the tooth-stick, when two men, one older than the other, were with him. A revelation came to him about the merit of using the tooth-stick. He was asked to show proper respect and give it to the elder of the two.
Reference: Sunan Abi Dawud 50 In-book : Book 1, Hadith 50 English translation : Book 1, Hadith 50
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