Musnad Ahmad 5164

Translation

✧ He divorced his wife while she was menstruating. 'Umar went to the Prophet ﷺ and asked him about it. He said: "Command 'Abdullah to take her back until she becomes pure from this menstruation, then she menstruates another time. When she becomes pure, let him either separate from her before having intercourse with her, or keep her, for that is the waiting period during which Allah has commanded women to be divorced."

Grades by grader

Narrators

1. 1
   ʿAbdullāh b. ʿUmar b. al-Khaṭṭāb

   One of the Companions who narrated most often, and one of the ʿAbādilah; he was among the people most strict in following the narrations (athar).d. 72 AH, or 73 AH, or 74 AH, also said: 75 AH
   عَبْدُ اللهِ بْنُ عُمَرَ بْنِ الْخَطَّابِأحد المكثرين من الصحابة والعبادلة ، وكان من أشد الناس اتباعا للأثر
   عن
2. 2
   Nāfiʿ mawlá Ibn ʿUmar

   trustworthy (thiqah), reliable (thabt), a well-known jurist (faqīh)d. 116 AH, or 117 AH, or 118 AH, or 119 AH, or 120 AH
   نَافِعٌثقة ثبت فقيه مشهور
   أخبرني
3. 3
   ʿUbaydullāh b. ʿUmar al-ʿUmarī

   trustworthy, precise (thiqah thabt)d. 144 AH or 145 AH or 146 AH or 147 AH
   عُبَيْدِ اللهِثقة ثبت
   عن
4. 4
   Yaḥyā

   trustworthy (thiqah), meticulous (mutqin), a memorizer (ḥāfiẓ), an imam and exemplar (qudwah)d. 198 AH
   يَحْيَىثقة متقن حافظ ، إمام قدوة
   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.