أَمۡ يَقُولُونَ ٱفۡتَرَىٰهُۖ قُلۡ فَأۡتُواْ بِعَشۡرِ سُوَرٖ مِّثۡلِهِۦ مُفۡتَرَيَٰتٖ وَٱدۡعُواْ مَنِ ٱسۡتَطَعۡتُم مِّن دُونِ ٱللَّهِ إِن كُنتُمۡ صَٰدِقِينَ 13 فَإِلَّمۡ يَسۡتَجِيبُواْ لَكُمۡ فَٱعۡلَمُوٓاْ أَنَّمَآ أُنزِلَ بِعِلۡمِ ٱللَّهِ وَأَن لَّآ إِلَٰهَ إِلَّا هُوَۖ فَهَلۡ أَنتُم مُّسۡلِمُونَ 14

Or do they say, "He invented it"? Say, "Then bring ten s´rahs like it that have been invented and call upon [for assistance] whomever you can besides Allah, if you should be truthful." And if they do not respond to you – then know that it [i.e., the Quran] was revealed with the knowledge of Allah[1] and that there is no deity except Him. Then,[2] would you [not] be Muslims?