سورة Al-Ahqaf ( The Curved Sand-hills ) - الآية 8

Do they claim that the Messenger himself has fabricated it? (If so), tell them: “If I have fabricated it, then you have no power to protect me from Allah's chastisement. He knows well the idle talk in which you indulge. He suffices as a witness between me and you. He is Most Forgiving, Most Merciful.”