and ʿUbayd Allah ibn Abi Bakr ibn Anas, ʿUbayd Allah ibn ʿUmar, ʿAṭāʾ ibn al-Sāʾib, ʿAlī ibn Zayd, ʿAmr ibn Dīnār, Muḥammad ibn Ziyād, Muḥammad ibn Wāsiʿ, Maṭar al-Warrāq, Abū Jamrah al-Ḍubāʿī, Hishām ibn ʿUrwah, Hishām ibn Ḥassān, Yaḥyā ibn Saʿīd al-Anṣārī, Yaḥyā ibn ʿAtīq, and Yūnus ibn ʿUbayd.
Among those who narrated from the two Hammāds were: ʿAbd al-Raḥmān ibn Mahdī, Wakīʿ, ʿAffān, Ḥajjāj ibn Minhāl, Sulaymān ibn Ḥarb, Shaybān, al-Qaʿnabī, ʿAbd Allah ibn Muʿāwiyah al-Jumaḥī, ʿAbd al-Aʿlā ibn Ḥammād, Abū al-Nuʿmān ʿĀrim, Mūsā ibn Ismāʿīl—though from Hammād ibn Zayd he possesses only a single hadith—Muʾammal ibn Ismāʿīl, Hudbah, Yaḥyā ibn Ḥassān, Yūnus ibn Muḥammad al-Muʾaddib, and others.
The ḥuffāẓ who were especially prolific and specialized in transmitting from Hammād ibn Salamah are: Bahz ibn Asad, Ḥibbān ibn Hilāl, al-Ḥasan al-Ashyab, and ʿUmar ibn ʿĀṣim.
Those devoted to Hammād ibn Zayd—who never met Ibn Salamah—are more numerous and more readily identifiable. They include: ʿAlī ibn al-Madīnī, Aḥmad ibn ʿAbdah, Aḥmad ibn al-Miqdām, Bishr ibn Muʿādh al-ʿAqadī, Khālid ibn Khidāsh, Khalaf ibn Hishām, Zakariyyā ibn ʿAdī, Saʿīd ibn Manṣūr, Abū al-Rabīʿ al-Zahrānī, al-Qawārīrī, ʿAmr ibn ʿAwn, Qutaybah ibn Saʿīd, Muḥammad ibn Abī Bakr al-Muqaddamī, Luwayn, Muḥammad ibn ʿĪsā ibn al-Ṭabbāʿ, Muḥammad ibn ʿUbayd ibn Ḥisāb, Musaddad, Yaḥyā ibn Ḥabīb, Yaḥyā ibn Yaḥyā al-Tamīmī, and a number of their contemporaries.
Therefore, when you encounter someone from this stratum who relates from “Hammād” without specifying which one, you may be certain he intends Ibn Zayd, for he never met Hammād ibn Salamah. In the same way, if a narrator who met them both says, “Hammād narrated to us,” and then falls silent, you examine the teacher from whom Hammād is reporting: if that teacher is shared by both Hammāds, you must suspend judgment; but if the teacher is unique to one of them, you identify the narrator by that exclusive teacher.
It was also ʿAffān’s custom never to transmit from Hammād ibn Zayd without naming him explicitly, whereas he might occasionally narrate from Hammād ibn Salamah without indicating him by name.