Goliath
Goliath is described in the biblical Book of Samuel as a Philistine giant defeated by the young David in single combat. The story signified Saul's unfitness to rule, as Saul himself should have fought for the Kingdom of Israel.
Biblical and Quranic narratives
A similar story appears in the Qu'ran 2:246–251. The Israelites demand of their prophet to appoint a king, and so God appoints the man Talut. The people respond poorly to the selection, upset that Talut does not seem special. God gives the Ark of the Covenant back to the Israelites in order to verify His choice (this is an event that predates Saul in the Bible). Talut leads the men to battle against an army led by the General Goliath. The Israelite army is small and doubtful, but a few men trust that God can still give them victory. David then kills Goliath and becomes king of Israel. The account also bears similarity to when Gideon led an army. See the above Gideon/Talut subsection.