وَلَمَّا جَآءَهُمُ ٱلْحَقُّ قَالُوا۟ هَـٰذَا سِحْرٌ وَإِنَّا بِهِۦ كَـٰفِرُونَ Qur’an Az-Zukhruf (43:30)Walamma jaahumu alhaqqu qaloo hatha sihrun wainna bihi kafiroona
See note [12] on 74:24 , where this connotation of sihr appears for the first time in the course of Qur'anic revelation.
When the pagan Makkans could not understand the wonderful power and authority with which the holy Prophet preached, they called his God given influence sorcery!