…is from page 155 of the Liberty Fund’s edition of Adam Smith’s 1759 book The Theory of Moral Sentiments (emphasis added):
In war and negotiation, therefore, the laws of justice are very seldom observed. Truth and fair dealing are almost totally disregarded. Treaties are violated; and the violation, if some advantage is gained by it, sheds scarce any dishonour upon the violator. The ambassador who dupes the minister of a foreign nation, is admired and applauded. The just man who disdains either to take or to give any advantage, but who would think it less dishonourable to give than to take one; the man who, in all private transactions, would be the most beloved and the most esteemed; in those public transactions is regarded as a fool and an idiot, who does not understand his business; and he incurs always the contempt, and sometimes even the detestation of his fellow-citizens. In war, not only what are called the laws of nations, are frequently violated, without bringing (among his own fellow-citizens, whose judgments he only regards) any considerable dishonour upon the violator; but those laws themselves are, the greater part of them, laid down with very little regard to the plainest and most obvious rules of justice. That the innocent, though they may have some connexion or dependency upon the guilty (which, perhaps, they themselves cannot help), should not, upon that account, suffer or be punished for the guilty, is one of the plainest and most obvious rules of justice. In the most unjust war, however, it is commonly the sovereign or the rulers only who are guilty. The subjects are almost always perfectly innocent. Whenever it suits the conveniency of a public enemy, however, the goods of the peaceable citizens are seized both at land and at sea; their lands are laid waste, their houses are burnt, and they themselves, if they presume to make any resistance, are murdered or led into captivity; and all this in the most perfect conformity to what are called the laws of nations.