Say to them-O Messenger-: "I am not able that I repel from myself harm, nor bring for it benefit, except what Allah willed that He repel from me of harm or bring for me of benefit. For every people is a time for the expiration of their period and their term, when the time for the expiration of their term and the vanishing of their ages comes, they do not stay behind from it an hour thus they be granted respite, nor does their term advance from the known time."