The Qur’an Verse 4

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

Les mécréants disent: «Tout ceci n'est qu'un mensonge qu'il (Muhammad) a inventé, et où d'autres gens l'ont aidé». Or, ils commettent là une injustice et un mensonge.

Those who disbelieve say: This is naught but a lie that he hath invented, and other folk have helped him with it, so that they have produced a slander and a lie.