‘A'isha said that God’s messenger was using the tooth-stick when two men, one older than the other, were with him. A revelation came to him about the excellence of the tooth-stick in which he was told to show proper respect, and give it to the older of the two. Abu Dawud transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الطهارة / 388
Hadith Gradingالألبانی:صَحِيحٌ | زبیر علی زئی:سنده صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «سنده صحيح، رواه أبو داود (50)»