23وَإِن كُنتُم في رَيبٍ مِمّا نَزَّلنا عَلىٰ عَبدِنا فَأتوا بِسورَةٍ مِن مِثلِهِ وَادعوا شُهَداءَكُم مِن دونِ اللَّهِ إِن كُنتُم صادِقينَHamid Aziz And if you are in doubt of what we have revealed unto Our servant, then bring a chapter like it, and call your witnesses other than Allah if you tell truth.