Al-Furqaan 4

وَقَالَ ٱلَّذِينَ كَفَرُوٓا۟ إِنْ هَٰذَآ إِلَّآ إِفْكٌ ٱفْتَرَىٰهُ وَأَعَانَهُۥ عَلَيْهِ قَوْمٌ ءَاخَرُونَ فَقَدْ جَآءُو ظُلْمًا وَزُورًا ﴿٤﴾

Waqala allatheena kafaroo in hatha illa ifkun iftarahu waaAAanahu AAalayhi qawmun akharoona faqad jaoo thulman wazooran

Those who disbelieve say: "This (the Quran) is nothing but a lie that he (Muhammad SAW) has invented, and others have helped him at it, so that they have produced an unjust wrong (thing) and a lie." The Noble Quran