Sunan al-Nasa'i The Book of Fasting Aisha bint Abi Bakr al-Musayb bin Rafa'i al-Asadi المسيب بن رافع الأسدي الكاهلي أبو العلاء Asim al-Ahwal عاصم الأحول Sufyan bin Sa‘id Ath-Thawri سفيان الثوري Swa'a al-Khza'y Akhw Mghyth سواء الخزاعي أخو Yahya bin Yaman al-Jly يحيى بن يمان العجلي That the Messenger of Allah used to fast continually and it ws said that he would not break his fast, and he used not to fast and it was said that he would not fast. https://parallelquran.com/hadith/sunan-al-nasai-2364/ Sunan Abi Dawud Fasting (Kitab Al-Siyam) Asim bin Abu al-Najud Hafsa bint Umar Hammad bin Zayd حماد بن زيد بن درهم الأزدي الأزرق Musa bin Isma'il al-Munqari al-Tabudhaki موسى بن إسماعيل المنقري - لتبوذكي Swa'a al-Khza'y Akhw Mghyth سواء الخزاعي أخو Hasan The Messenger of Allah (ﷺ) used to fast three days every month. https://parallelquran.com/hadith/sunan-abi-dawud-2450/