Qur'an 25:4 · Al-Furqaan

وَقَالَ ٱلَّذِينَ كَفَرُوٓا۟ إِنْ هَٰذَآ إِلَّآ إِفْكٌ ٱفْتَرَىٰهُ وَأَعَانَهُۥ عَلَيْهِ قَوْمٌ ءَاخَرُونَ ۖ فَقَدْ جَآءُو ظُلْمًۭا وَزُورًۭا

(4) And those who disbelieve say, "This [Qur’ān] is not except a falsehood he invented, and another people assisted him in it." But they have committed an injustice and a lie.