What? Do they say that he (the Messenger) has fabricated a falsehood in attribution to God? If He so wills, He can seal up your heart (so you would not be able to recite to them anything of Revelation. But what you convey to them is the Revelations from Us.) And God blots out falsehood and affirms the truth to be true by His decrees. Surely, God has full knowledge of what lies hidden in the bosoms.