Yunus, 38 Ayah
10:38
أَمۡ يَقُولُونَ ٱفۡتَرَىٰهُۖ قُلۡ فَأۡتُواْ بِسُورَةٖ مِّثۡلِهِۦ وَٱدۡعُواْ مَنِ ٱسۡتَطَعۡتُم مِّن دُونِ ٱللَّهِ إِن كُنتُمۡ صَٰدِقِينَ ٣٨
'Am Yaqūlūna Aftarāhu ۖ Qul Fa'tū Bisūratin Mithlihi Wa Ad`ū Mani Astaţa`tum Min Dūni Al-Lahi 'In Kuntum Şādiqīna
Or do they say [about the Prophet], "He invented it?" Say, "Then bring forth a surah like it and call upon [for assistance] whomever you can besides Allah, if you should be truthful."