We sent down messengers before you and gave them wives and children. Yet it was not possible for a messenger to bring a sign, save by the command of God. Every age has had its revelation. 38 God annuls or confirms whatever He wills [of His earlier messages] - for with Him is the source of all revelation. 39 And whether We show you part of what We promise them or take you in death, upon you is only the [duty of] notification, and upon Us is the account. 40 Do they not see Us advancing from all sides into their land and reducing its frontiers? It is for God to judge; and there is none to reverse His judgement. He is swift at reckoning. 41 Those before them did (also) devise plots; but in all things the master-planning is Allah's He knoweth the doings of every soul: and soon will the Unbelievers know who gets home in the end. 42 The disbelievers say, “You are not a (Noble) Messenger (of Allah)”; proclaim, “Allah is a Sufficient Witness between me and you, and (so is) he who has knowledge of the Book.” 43