And this is correct. But that is not the point of the present note. Rather, it is his statement immediately after what I quoted from him above: “But this biographical notice deserves careful attention, for it apparently involves a reversal [of names]. Malik narrated the hadith from Abu Bakr ibn Muhammad ibn ʿAmr ibn Hazm, from ʿAbd Allah ibn al-Nadr, from the Prophet, peace and blessings be upon him; whereas some of Malik’s narrators said: from Abu al-Nadr...”
I regret to say: “I hear the clatter of a mill, but see no flour.” For al-Hafiz, may Allah have mercy on him, mentioned nothing in this alleged careful attention that would provide further identification of Nadr ibn ʿAbd Allah, in response to al-Dhahabi’s declaring him unknown, apart from the fact that Malik’s narrators differed over his name. What sort of careful attention is that?! Had he noticed what I mentioned earlier—namely, that Yazid ibn Abi Habib and Saʿid ibn Abi Hilal, both trustworthy, agreed in naming him Nadr ibn ʿAbd Allah in Abu Bakr ibn Hazm’s narration from him—he could have established that this is the stronger view in light of the narrators’ inconsistency over his name when reporting from Malik. Otherwise, what benefit is there in relating the inconsistency without determining the correct view?!
This is especially so since he was seeking to rebut al-Dhahabi’s declaring him unknown, particularly as he concluded it by saying: “Ibn ʿAbd al-Barr said: ‘I know of no unknown narrator among the transmitters of al-Muwattaʾ other than him.’” In sum, al-Hafiz—may Allah forgive us and him—did nothing in this careful attention he claimed except arrive at the conclusion that this Nadr was unknown, because Abu Bakr ibn Hazm alone narrated from him, even though Malik’s narrators differed over his name.
It is worth mentioning that he derived this account of the disagreement from al-Hafiz Ibn ʿAbd al-Barr’s book al-Tamhid, in volume 13, pp. 86–87. All of this is a digression prompted by the aforementioned claim of al-Hafiz and his response to al-Dhahabi’s declaring Nadr unknown—a judgment with which he himself agreed. Otherwise, the point of the note—the crux of the matter, as they say—is his earlier statement: