Though a Koran were revealed by which mountains should be removed, or the earth cleaved in sunder, or the dead be caused to speak, it would be in vain. But the matter belongeth wholly unto God. Do not therefore the believers know, that if God pleased, He would certainly direct all men? Adversity shall not cease to afflict the unbelievers for that which they have committed, or to sit down near their habitations, until God's promise come: For God is not contrary to the promise.