It is likewise transmitted by way of Ibn Ishaq, from al-Zuhri, from ʿUrwah, in a report identical to that of Maʿmar—indeed more complete—yet it still contains none of this extra material. Ibn Jarir also records it in his History (3 / 271 – 285) through Maʿmar, Ibn Ishaq, and others, all from al-Zuhri, without the addition. Taken together, these routes show that the extra wording is objectionable: its chain is severely broken (muʿḍal), and the reliable transmitters do not report it. Allah alone grants success.
Second reply: Even if the report were authentic, it could not be used to override the explicit hadiths that prohibit building mosques over graves, for two reasons:
First: Nothing in the story indicates that the Prophet ﷺ learned of the matter and approved it.
Second: Even if we were to assume that the Prophet ﷺ knew of it and sanctioned it, it would have to be understood as having occurred before the prohibition, for the hadiths plainly state that the Prophet ﷺ forbade the practice near the end of his life, as shown earlier. Hence it is impermissible to abandon the later, categorical text in favor of an earlier one—assuming it were even sound—when the two appear to conflict. This is self-evident. We ask Allah, exalted is He, to protect us from following our whims.