al-Iʿtiṣām 2/146–147, in summary:
Ibn Rushd said, “The adhān performed in front of the imam on Friday is disliked because it is a later invention. The first to introduce it was Hishām ibn ʿAbd al-Malik, for he moved the adhān that used to be given at al-Zawrāʾ to the elevated platform, and the one that had been on the platform to the space directly before him. The caliphs after him maintained that practice down to our own time. It is therefore an innovation (bidʿah), whereas what the Messenger of Allah ﷺ and the Rightly Guided Caliphs after him practiced is the sunnah.”
Ibn Ḥabīb added that the adhān given when the imam ascends the minbar remained unchanged in the time of ʿUthmān (Allah be pleased with him), a point that agrees with the sound historical reports, and that ʿUthmān introduced nothing beyond the additional adhān at al-Zawrāʾ. Consequently, Hishām’s transfer of the legislated adhān from the minaret to the space before him rendered that act an innovation within what had originally been legislated.
It should also be understood that there is absolutely no report indicating that the Prophetic adhān