Hud 11:13

Am yaqooloona iftarahu qul fa/toobiAAashri suwarin mithlihi muftarayatin wadAAoomani istataAAtum min dooni Allahi in kuntum sadiqeen

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."

Do they say that he has fabricated it? Say (to them), “Then bring ten Sūrahs like this, fabricated. And call whomsoever you can, other than Allah, if you are true.”