Am yaqūlūnaftarāh, qul faʾtū biʿashri suwarim mithlihī muftarayātiw wadʿū manistaṭaʿtum min dūnillāhi in kuntum ṣādiqīn.
Or do they say, "He invented it"? Say, "Then bring ten sūrahs like it that have been invented and call upon [for assistance] whomever you can besides Allāh, if you should be truthful."