(30:58) And We have certainly presented to the people in this Qur`an from every [kind of] example. But, [O Muhammad], if you should bring them a sign, the disbelievers will surely say, "You [believers] are but falsifiers." (30:59) Thus does Allah seal the hearts of those who do not know. (30:60) So be patient. Indeed, the promise of Allah is truth. And let them not disquiet you who are not certain [in faith].