Here the word "hand" represents power. God enabling the army of Israel to defeat the army of Judah is spoken of as if God had put the army of Judah in the hand of the army of Israel. AT: "God enabled you to defeat them" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-metaphor]])
Oded speaks of Yahweh knowing how severely the army of Israel slaughtered the army of Judah as if the rage with which the army of Israel slaughtered them were an object so large that it reached into heaven. That Yahweh knows what they have done implies that he will respond. AT: "you have slaughtered them in such great rage that Yahweh himself has noticed and will take vengeance" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-explicit]])