﴿ أَمْ يَقُولُونَ ٱفْتَرَىٰهُ ۖ قُلْ إِنِ ٱفْتَرَيْتُهُۥ فَلَا تَمْلِكُونَ لِى مِنَ ٱللَّهِ شَيْـًٔا ۖ هُوَ أَعْلَمُ بِمَا تُفِيضُونَ فِيهِ ۖ كَفَىٰ بِهِۦ شَهِيدًۢا بَيْنِى وَبَيْنَكُمْ ۖ وَهُوَ ٱلْغَفُورُ ٱلرَّحِيمُ ﴾

“Or do they say, “He has invented all this”? Say [O Muhammad]: “Had I invented it, you would not be of the least help to me against God. He is fully aware of that [slander] into which you so reck­lessly plunge: enough is He as a witness between me and you! And [withal,] He alone is truly-forgiving, a true dispenser of grace.””

Please check ayah 46:9 for complete tafsir.