Musnad Ahmad 4418

Translation

"The Prophet (S) prayed five (Rakah) for Zuhr, so it was said to him: 'Has the prayer been added to, or have you merely forgotten?' So he (S) performed two prostrations after he had said the Salam." (Using translation from Tirmidhī 392)

Grades by grader

Narrators

1. 1
   ʿAbdullāh b. Masʿūd

   One of the earliest and foremost (al-sābiqūn al-awwalūn), and one of the leading scholars among the Companions; his virtues are manyd. 28 AH, or 32 AH, 33 AH
   عَبْدُ اللهِ بْنُ مَسْعُودٍمن السابقين الأولين ، ومن كبار العلماء من الصحابة ، مناقبه جمة
   عن
2. 2
   al-Aswad b. Yazīd al-Nakhaʿī

   Mukhaḍram (lived in both the pre-Islamic and Islamic eras), trustworthy (thiqah), prolific narrator (mukthir), jurist (faqīh)d. 74 AH, or 75 AH
   أَبِيهِمخضرم ، ثقة ، مكثر ، فقيه
   عن
3. 3
   ʿAbd al-Raḥman b. al-Aswad al-Nakhaʿī

   trustworthy (thiqah)d. 98 AH, or: 99 AH
   عَبْدِ الرَّحْمَنِ بْنِ الْأَسْوَدِثقة
   عن
4. 4
   Jābir

   weak (ḍaʿīf), a Rāfiḍīd. 127 AH, or 128 AH, 132 AH
   جَابِرٍضعيف رافضي
   عن
5. 5
   Shuʿbah

   Trustworthy (thiqah), a retentive memorizer (ḥāfiẓ), meticulous (mutqin)d. 160 AH
   شُعْبَةُثقة حافظ , متقن
   حدثنا
6. 6
   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
   حدثنا
7. 7
   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.