Sura al-Furqān 25:4

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

wa-qāla lladhīna kafarū in hādhā illā ifkun iftarāhu wa-aʿānahu ʿalayhi qawmun ākharūna fa-qad jāʾū ẓulman wa-zūran

But the misbelievers say: "Naught is this but a lie which he has forged, and others have helped him at it." In truth it is they who have put forward an iniquity and a falsehood.