And [in] the alternation of night and day and [in] what Allah sends down from the sky of provision and gives life thereby to the earth after its lifelessness and [in His] directing of the winds are signs for a people who reason.
And We gave them clear proofs of the matter [of religion]. And they did not differ except after knowledge had come to them - out of jealous animosity between themselves. Indeed, your Lord will judge between them on the Day of Resurrection concerning that over which they used to differ.
Have you seen he who has taken as his god his [own] desire, and Allah has sent him astray due to knowledge and has set a seal upon his hearing and his heart and put over his vision a veil? So who will guide him after Allah ? Then will you not be reminded?
And when it was said, 'Indeed, the promise of Allah is truth and the Hour [is coming] - no doubt about it,' you said, 'We know not what is the Hour. We assume only assumption, and we are not convinced.' "