(17) The repentance accepted by Allah is only for those who do wrong in ignorance [or carelessness] and then repent soon after. It is those to whom Allah will turn in forgiveness, and Allah is ever Knowing and Wise. (18) But repentance is not [accepted] of those who [continue to] do evil deeds up until, when death comes to one of them, he says, "Indeed, I have repented now," or of those who die while they are disbelievers. For them We have prepared a painful punishment.
(98) Then has there not been a [single] city that believed so its faith benefited it except the people of Jonah? When they believed, We removed from them the punishment of disgrace in worldly life and gave them enjoyment for a time.
Three (signs), once they come out, believing will not benefit those who did not believe earlier: the rising of the sun its setting place, the Antichrist, and the beast (Dabbah).