16 Therefore, renounce war and proclaim peace, and seek diligently to turn the hearts of the children to their fathers, and the hearts of the fathers to the children;
34 And if any nation, tongue, or people should proclaim war against them, they should first lift a standard of peace unto that people, nation, or tongue;
35 And if that people did not accept the offering of peace, neither the second nor the third time, they should bring these testimonies before the Lord;
36 Then I, the Lord, would give unto them a commandment, and justify them in going out to battle against that nation, tongue, or people.
37 And I, the Lord, would fight their battles, and their children’s battles, and their children’s children’s, until they had avenged themselves on all their enemies, to the third and fourth generation.
38 Behold, this is an ensample unto all people, saith the Lord your God, for justification before me. (D&C 98)