"Then, may it be that thou wilt give up part of what is revealed to thee and thy breast will he straitened by it, because they say: Why has not a treasure been sent down for him or an angel come with him? Thou art only a warner And Allah is in charge of all things. Or, say they He has forged it. Say: Then bring ten forged chapters like it, and call upon whom you can besides Allah, if you are truthful. But if they answer you not, then know that it is revealed by Allah's knowledge, and that there is no God but He. Will you then submit?"