Those who associate [others with God] say, "If God had so willed we would not have worshipped anything besides Him, neither we nor our fathers, nor would we have forbidden anything without His sanction." So did those who went before them. The duty of the messengers is only to convey the message clearly. 35 To every community We have sent an apostle. (saying:) "Worship God, and keep away from all other deities." Thus some of them were guided by God, and ruin was justified on some. Travel over the earth and see what befell those who accused (the apostles) of lies. 36 If thou art anxious for their guidance, yet Allah guideth not such as He leaves to stray, and there is none to help them. 37 And they swear by God the most solemn of oaths that God would not raise him who dieth. Yea! it is a promise on Him incumbent but most of mankind know not. 38 That He may explain unto them that wherein they differ, and that those who disbelieved may know that they were liars. 39 When We decree a thing, We only say: 'Be' and it is. 40