Surah Hud Verse 13 - English Translation by Muhammad Mahmoud Ghali
Surah Hudأَمۡ يَقُولُونَ ٱفۡتَرَىٰهُۖ قُلۡ فَأۡتُواْ بِعَشۡرِ سُوَرٖ مِّثۡلِهِۦ مُفۡتَرَيَٰتٖ وَٱدۡعُواْ مَنِ ٱسۡتَطَعۡتُم مِّن دُونِ ٱللَّهِ إِن كُنتُمۡ صَٰدِقِينَ
Or (even) do they say, "He has fabricated it!" Say, "Then come up with ten Surahs the like of it, fabricated; and invoke whomever you are able, apart from Allah, in case you are sincere