Hadith 4:282
Narrated to us Sharik, from ‘Asim, from ‘Abdullah ibn ‘Amir ibn Rabi‘ah, from his father, who said: I saw the Messenger of Allah (may Allah bless him and grant him peace) using the siwak while he was fasting.
حدثنا شريك عن عاصم عن عبد الله بن عامر بن ربيعة عن أبيه قال رأيت رسول الله صلى الله عليه وسلم يستاك وهو صائم