ʿUbayd ibn al-Abjar ibn ʿAwf ibn al-Ḥārith ibn al-Khazraj.
Al-Abjar’s given name was Khudrah; some, however, maintain that Khudrah was actually al-Abjar’s mother. (1)
Abu Saʿid’s maternal half-brother was Qatadah ibn al-Nuʿmān al-Ẓafari, one of the Companions who fought at Badr.
His father, Mālik, was martyred at Uhud, while Abu Saʿid himself was present at the Battle of the Trench and the Pledge of Riḍwān.
He transmitted a large and excellent body of hadith from the Prophet ﷺ, and also narrated from Abu Bakr, ʿUmar, and several others.
He was counted among the jurists who exercised independent legal reasoning.
Those who transmitted from him include Ibn ʿUmar, Jābir, Anas, a number of his contemporaries, ʿĀmir ibn Saʿd, ʿAmr ibn Sulaym, Abu Salamah ibn ʿAbd al-Raḥmān, Nāfiʿ al-ʿUmari, Busrah ibn Saʿīd, Bishr ibn Ḥarb al-Nadabi, Abu al-Ṣiddīq al-Nāji, Abu al-Waddāk, Abu al-Mutawakkil al-Nāji, Abu Naḍrah al-ʿAbdi, Abu Ṣāliḥ al-Sammān, Saʿīd ibn al-Musayyib, ʿAbd Allah ibn Khabbāb, ʿAbd al-Raḥmān ibn Abi Saʿid al-Khudri, ʿAbd al-Raḥmān ibn Abi Nuʿm, ʿUbayd Allah ibn ʿAbd Allah ibn ʿUtbah, ʿAṭāʾ ibn Yazīd al-Laythi, ʿAṭāʾ ibn Yasār, ʿAṭiyyah al-ʿAwfi, Abu Hārūn al-ʿAbdi, ʿIyāḍ ibn ʿAbd Allah, Qazaʿah ibn Yaḥyā, Muḥammad ibn ʿAlī al-Bāqir, Abu al-Haytham Sulaymān ibn ʿAmr al-ʿAtwāri, Saʿīd ibn Jubayr, al-Ḥasan al-Baṣri, Abu Salamah ibn ʿAbd al-Raḥmān, and many others.
ʿAbd al-Raḥmān ibn Abi Saʿid narrated from his father who said:
“On the day of Uhud I was brought before the Prophet ﷺ when I was thirteen years old. My father kept holding my hand and saying, ‘Messenger of Allah, he is sturdy-boned!’ The Prophet of Allah looked me up and down, then said, ‘Send him back,’ so he turned me away.” (2)