Surah Al-Baqara Verse 23 - English Translation by Ali Unal
Surah Al-Baqaraوَإِن كُنتُمۡ فِي رَيۡبٖ مِّمَّا نَزَّلۡنَا عَلَىٰ عَبۡدِنَا فَأۡتُواْ بِسُورَةٖ مِّن مِّثۡلِهِۦ وَٱدۡعُواْ شُهَدَآءَكُم مِّن دُونِ ٱللَّهِ إِن كُنتُمۡ صَٰدِقِينَ
If you are in doubt about the Divine authorship of what We have been sending down on Our servant (Muhammad) (and claim that it is the work of a human being like Muhammad who is illiterate), then produce just a surah like it and call for help to all your supporters, all those (to whom you apply for help apart from God), if you are truthful in your doubt and claim