And indeed We sent Messengers before you (O Muhammad SAW), and made for them wives and offspring. And it was not for a Messenger to bring a sign except by Allah's Leave. (For) each and every matter there is a Decree (from Allah). 38 Allah effaceth what He will, and establisheth (what He will), and with Him is the source of ordinance. 39 Whether We show you (O Muhammad SAW) part of what We have promised them or cause you to die, your duty is only to convey (the Message) and on Us is the reckoning. 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 that were before them devised; but God's is the devising altogether. He knows what every soul earns. The unbelievers shall assuredly know whose will be the Ultimate Abode. 42 The unbelievers say, 'Thou art not an Envoy.' Say: 'God suffices as a witness between me and you, and whosoever possesses knowledge of the Book.' 43