Musnad Ahmad 2151

Translation

✧ The Messenger of Allah ﷺ would fast until we would say, 'He does not intend to break his fast,' and he would break his fast until we would say, 'He does not intend to fast.' And he did not fast a full month consecutively other than Ramadan since he came to Madinah.

Grades by grader

Narrators

1. 1
   ʿAbdullāh b. ʿAbbās

   One of the Companions who narrated most prolifically (mukthirūn).d. 65 AH, or 67 AH, or 68 AH, also said: 69 AH, also said: 70 AH; also said: 73 AH
   عَبْدُ اللهِ بْنُ عَبَّاسٍأحد المكثرين من الصحابة
   عن
2. 2
   Saʿīd b. Jubayr al-Asadī

   Trustworthy (thiqah), firmly reliable (thabt), a jurist (faqīh); his narration from ʿĀʾishah, Abū Mūsā and the like is mursald. 95 AH, from al-Fallās: 94 AH
   سَعِيدِ بْنِ جُبَيْرٍثقة ثبت فقيه ، وروايته عن عائشة وأبي موسى ونحوهما مرسلة
   عن
3. 3
   Abū Bishr

   Trustworthy (thiqah), among the most reliable of people in narrating from Saʿīd b. Jubayrd. 123 AH or 124 AH or 125 AH or 126 AH, also said: 131 AH
   أَبِي بِشْرٍثقة ، من أثبت الناس في سعيد بن جبير
   عن
4. 4
   Shuʿbah

   Trustworthy (thiqah), a retentive memorizer (ḥāfiẓ), meticulous (mutqin)d. 160 AH
   شُعْبَةُثقة حافظ , متقن
   حدثنا
5. 5
   Muḥammad b. Jaʿfar

   Trustworthy (thiqah), his book was sound (ṣaḥīḥ al-kitāb), except that he had some heedlessness (ghaflah)d. 192 AH or 193 AH or 194 AH
   مُحَمَّدُ بْنُ جَعْفَرٍثقة صحيح الكتاب إلا أن فيه غفلة
   حدثني
6. 6
   Aḥmad b. Ḥanbal

   Trustworthy (thiqah), a memorizer (ḥāfiẓ), a jurist (faqīh), an authority (ḥujjah).d. 241 AH, Abū Umayyah Muḥammad b. Ibrāhīm al-Ṭarsūsī said: 242 AH, and no one followed him in his view
   أحمد بن حنبلثقة حافظ فقيه حجة

Who each narrator was and how reliable, from hdith.com

Latin names and English verdicts with a dotted underline are machine translations, not reviewed.