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 Though you [Prophet] may be eager to guide them, God does not guide those whom He lets go astray, [because of their refusal to give a positive response to the truth]. They will have no supporters. 37 And they swear by Allah their strongest oaths [that] Allah will not resurrect one who dies. But yes - [it is] a true promise [binding] upon Him, but most of the people do not know. 38 In order that He may make clear to them the matter in which they differed, and the disbelievers may realise that they were liars. 39 Yet when We will a thing We have only to say: "Be", and it is. 40