al-Mufaḍḍal al-Ghallābī said in "Questions of Ibn Maʿīn": "And I asked him about a ḥadīth narrated to me by ʿAbd Allāh ibn Jaʿfar—he is al-Raqqī—from ʿUbayd Allāh ibn ʿAmr—he is al-Raqqī—who said: A man from the people of Kūfah narrated to me (from ʿAbd al-Malik ibn ʿUmayr) from al-Ḍaḥḥāk ibn Qays who said: (I said: and he mentioned it) and he said: al-Ḍaḥḥāk ibn Qays is not al-Fihri." I said: And this narration of Ibn Jaʿfar indicates that the Kūfan man was omitted from the isnād of Ibn ʿAsākir, and perhaps that was from Manṣūr ibn Ṣaqīr, for he is weak, and it was through his path that Ibn Mandah extracted it as in "al-Tahdhīb." And there came a narration in which the Kūfan man is named, Abū Dāwūd extracted it (5271) through the path of Marwān who narrated to us from Muḥammad ibn Ḥassān al-Kūfī, from ʿAbd al-Malik ibn ʿUmayr from Umm ʿAṭiyyah al-Anṣārīyah: "That a woman used to perform circumcision in Medina, and the Prophet (ṣallá Allāhu ʿalayhi wa-sallam) said..." and he mentioned it similarly. And he said: "It was narrated from ʿUbayd Allāh ibn ʿAmr from ʿAbd al-Malik with its meaning and isnād, Abū Dāwūd said: He is not strong, and it has been narrated mursal, and Muḥammad ibn Ḥassān is unknown, and this ḥadīth is weak." I said: And the reason for the weakness is the anonymity and confusion in its isnād as you see, and the ḥāfiẓ said following the narration of Ibn Ṣaqīr with Ibn Mandah: "And ʿAbd Allāh ibn Jaʿfar al-Raqqī, who is more reliable than Manṣūr, inserted between ʿUbayd Allāh and ʿAbd al-Malik the Kūfan man who was not named, and it appears from the narration of Marwān ibn Muʿāwiyah that he is Muḥammad ibn Ḥassān al-Kūfī, so he is the one who is unique in it and he is unknown. And it results from this that there is a disagreement