King David (before he became king) was a shepherd boy who tended to his father's sheeps and fought off wolves and other wild animals. He was small and frail looking and was not conscripted in the King Saul's army.
He is the son of Jesse, a descendant of Jesus Christ and an Israelite who according to the Holy Bible was the direct replacement to King Saul whom the Lord God had departed from.
King David rose to prominence after defeating and killing the giant Goliath who had been taunting the children of Israel for many days with a slingshot and some stones.
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