Here the word "hand" represents power. Yahweh enabling the army of Israel to conquer their enemy is spoken of as if Yahweh had put the enemy army into Israel's hand. AT: "Yahweh enabled Israel to conquer the enemy" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-metonymy]])
This is a practice where the tendons in the backs of the legs are cut so that the horses cannot run. See how you translated this word in [Joshua 11:6](./06.md).