﴿ وَلَمَّا جَآءَهُمُ ٱلْحَقُّ قَالُوا۟ هَٰذَا سِحْرٌۭ وَإِنَّا بِهِۦ كَٰفِرُونَ ﴾

“but now that the truth has come to them, they say, “All this is mere spellbinding eloquence” - and, behold, we deny that there is any truth in it!””

(And now that the Truth) the Scripture and Messenger (hath come unto them they say: This) i.e. this Scripture (is mere magic) is a mere lie, (and lo! we are disbelievers therein) in Muhammad (pbuh) and the Qur'an.