1 Samuel 14:20

So they blew 300 trumpets. And Yahweh set the sword of one against another even throughout the whole camp. And the camp fled as far as Beth-shittah toward Zererah, as far as the edge of Abel-meholah, by Tabbath.

Indeed, the sons of Ammon and Moab stood against the inhabitants of Mount Seir to devote them to destruction and to utterly eradicate them; and when they had finished with the inhabitants of Seir, they helped to bring one another to ruin.

“So I will incite Egyptians against Egyptians; And they will each fight against his brother and each against his neighbor, City against city and kingdom against kingdom.

“And I will call for a sword against him on all My mountains,” declares Lord Yahweh. “Every man’s sword will be against his brother.