Commentaries:
Adam Clarke
He shall judge among the heathen - David shall greatly extend his dominion, and rule over the Idumeans, Moabites, Philistines, etc.
He shall fill - with the dead bodies - He shall fill pits - make heaps of slain; there shall be an immense slaughter among his enemies.
He shall wound the heads - He shall so bring down the power of all the neighboring kings, as to cause them to acknowledge him as their lord, and pay him tribute.
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