23وَإِن كُنتُم في رَيبٍ مِمّا نَزَّلنا عَلىٰ عَبدِنا فَأتوا بِسورَةٍ مِن مِثلِهِ وَادعوا شُهَداءَكُم مِن دونِ اللَّهِ إِن كُنتُم صادِقينَAhmed & SamiraAnd if you were in doubt/suspicion from what We descended on Our worshipper/slave , so come/bring with a chapter from its similar/equal/alike to it, and call your witnesses/testifiers from other than God, if you were truthful.