Say: Tell me if the chastisement of Allah should overtake you or the hour should come upon you, will you call (on others) besides Allah, if you are truthful?

And on the day when He will gather them as though they had not stayed but an hour of the day, they will know each other. They will perish indeed who called the meeting with Allah to be a lie, and they are not followers of the right direction.

Men ask you about the hour; say: The knowledge of it is only with Allah, and what will make you comprehend that the : hour may be nigh.