Musnad Ahmad 18427

Translation

✧ The Messenger of God ﷺ used to straighten our rows as if he were straightening arrows, until he thought that we had learned it from him and understood it. One day he turned his face and saw a man with his chest sticking out. He said: You will straighten your rows, or God will cause your faces to differ.

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Other narrations of this report

Sunan Ibn Majah 560

Narrators

1. 1
   al-Nuʿmān b. Bashīr al-Anṣārī

   He and his parents had companionship with the Prophet (ṣuḥbah)d. 60 AH, or: 64 AH, or: 65 AH, or: 66 AH
   النُّعْمَان بْن بَشِير الْأَنْصَارِيّله ولأبويه صحبة
   عن
2. 2
   Simāk b. Ḥarb al-Bakrī

   Truthful (ṣadūq); his narrations from ʿIkrimah in particular are inconsistent (muḍṭarib); he changed (taghayyara) towards the end of his life, and at times he would accept prompting (yulaqqan).d. 123 AH
   سِمَاكُ بْنُ حَرْبٍصدوق , وروايته عن عكرمة خاصة مضطربة , وقد تغير بأخرة ، فكان ربما يلقن
   أخبرنا
3. 3
   Ḥammād b. Salamah

   trustworthy (thiqah), devout (ʿābid), the most reliable of people in narrating from Thābit; his memory changed towards the end of his lifed. 167 AH, or 165 AH.
   حَمَّادُ بْنُ سَلَمَةَثقه عابد ، أثبت الناس في ثابت ، وتغير حفظه بآخره
   حدثنا
4. 4
   Bahz

   trustworthy, precise (thiqah thabt)d. Ibn Qāniʿ said: 197 AH, ʿUqbah b. Mukram al-ʿAmmī said, and ʿAbd Allāh b. Aḥmad b. Ḥanbal: before 198 AH, others said: after 200 AH
   بَهْزٌثقة ثبت
   حدثنا
5. 5
   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.