Goliath

When they faced Goliath and his army, they prayed, ‘Our Lord, grant us patience, make our steps firm, and help us against the disbelievers.’

2:250And when they went into the field against Goliath and his hosts they said: Our Lord! Bestow on us endurance, make our foothold sure, and give us help against the disbelieving folk.

By Allah’s will, they defeated them, and David slew Goliath. Allah granted him kingship and wisdom and taught him what He willed. If Allah did not check one group of people by means of another, the earth would be corrupted. But Allah is Most Gracious to all.

2:251So they routed them by Allah's leave and David slew Goliath; and Allah gave him the kingdom and wisdom, and taught him of that which He willeth. And if Allah had not repelled some men by others the earth would have been corrupted. But Allah is a Lord of Kindness to (His) creatures.