So they defeated them (the army of Jalut [Goliath]) by Allah’s Command and Dawud (David) killed Jalut. And Allah granted (Dawud) sovereignty and wisdom and taught him what He wished. If Allah had not removed one group by means of another, (the human life on) earth would have been ruined (due to persistent suppression and oppression by tyrants). But Allah is Bountiful to all the worlds.