Sura al-Baqara 2:23

وَإِن كُنتُمْ فِى رَيْبٍ مِّمَّا نَزَّلْنَا عَلَىٰ عَبْدِنَا فَأْتُوا۟ بِسُورَةٍ مِّن مِّثْلِهِۦ وَٱدْعُوا۟ شُهَدَآءَكُم مِّن دُونِ ٱللَّـهِ إِن كُنتُمْ صَٰدِقِينَ

wa-in kuntum fī raybin mimmā nazzalnā ʿalā ʿabdinā fa-ʾtū bi-sūratin min mithlihi wa-idʿū shuhadāʾakum min dūni allāhi in kuntum ṣādiqīna

And if ye are in doubt as to what We have revealed from time to time to Our servant, then produce a Sura like thereunto; and call your witnesses or helpers (If there are any) besides Allah, if your (doubts) are true.