Among those who narrated from him were: Yaḥyā ibn Saʿīd al-Qaṭṭān—his close companion—, Ibn Mahdī, his cousin Ṭalq ibn Ghannām, his son ʿUmar ibn Ḥafṣ, Yaḥyā ibn Yaḥyā, Aḥmad, Isḥāq, Yaḥyā, ʿAlī, the two sons of Abū Shaybah, Aḥmad al-Dawraqī, Sufyān ibn Wakīʿ, Salm ibn Junādah, Sahl ibn Zanjalah, Ṣadaqah ibn al-Faḍl, Abū Saʿīd al-Ashajj, ʿAlī ibn Khashram, ʿAmr al-Nāqid, Ibn Numayr, Hārūn ibn Isḥāq, Hannād, Abū Kurayb, Abū Hishām al-Rifāʿī, and many others besides them; the last of his transmitters was Aḥmad ibn ʿAbd al-Jabbār al-ʿUṭāridī.
Aḥmad ibn Kāmil said: “Hārūn al-Rashīd appointed Ḥafṣ to the judgeship of the Sharqiyyah district in Baghdad, then moved him to the judiciary of Kūfah.”
Abū Jaʿfar al-Jammāl remarked: “The last of the senior judges in Kūfah was Ḥafṣ ibn Ghayāth.”
Yaḥyā ibn Maʿīn and others declared: “Trustworthy.”
ʿAbd al-Khāliq ibn Manṣūr reported: “Yaḥyā was asked, ‘Whose memory was superior— Ibn Idrīs (1) or Ḥafṣ?’ He replied, ‘Ibn Idrīs was a memoriser, whereas Ḥafṣ was a hadith scholar who possessed knowledge.’ It was then said, ‘And what about Ibn Fuḍayl?’ He answered, ‘Ibn Idrīs had the better memory.’”
Al-ʿIjlī said: “Trustworthy, reliable, and a jurist.”
Wakīʿ would sometimes be questioned about an issue and would say, “Go to our judge and ask him,” for Ḥafṣ was a chaste, upright shaykh.