أَمْ يَقُولُونَ افْتَرَاهُ ۖ قُلْ فَأْتُوا۟ بِعَشْرِ سُوَرٍۢ مِّثْلِهِۦ مُفْتَرَيَـٰتٍۢ وَٱدْعُوا۟ مَنِ ٱسْتَطَعْتُم مِّن دُونِ ٱللَّهِ إِن كُنتُمْ صَـٰدِقِينَ

Or do they say, "He invented it"? Say, "Then bring ten surahs like it that have been invented and call upon [for assistance] whomever you can besides Allah, if you should be truthful."

— Hūd 11:13