Sunan Abi Da'ud · Hadith 2430

حدثنا إبراهيم بن موسى، حدثنا عيسى، حدثنا عثمان، - يعني ابن حكيم - قال سألت سعيد بن جبير عن صيام، رجب فقال أخبرني ابن عباس، أن رسول الله صلى الله عليه وسلم كان يصوم حتى نقول لا يفطر ويفطر حتى نقول لا يصوم ‏.‏

Narrated 'Uthman b. Hakim: I asked Sa'id b. Jubair about fasting during Rajab. He said: Ibn 'Abbas told me that the Messenger of Allah (ﷺ) used to fast to such an extent that we thought that he would never break his fast ; and he would go without fasting to such and extent that he would never fast.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).