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.
David
David is an important figure in Islam as one of the major prophets sent by God to guide the Israelites. David is mentioned several times in the Quran with the Arabic name داود, "Dāwūd", often with his son Solomon. In the Qur'an: David killed Goliath (2:251), a giant soldier in the Philistine army. When David killed Goliath, God granted him kingship and wisdom and enforced it (38:20). David was made God's "vicegerent on earth" (38:26) and God further gave David sound judgment (21:78; 37:21–24, 26) as well as the Psalms, regarded as books of divine wisdom (4:163; 17:55). The birds and mountains united with David in uttering praise to God (21:79; 34:10; 38:18), while God made iron soft for David (34:10), God also instructed David in the art of fashioning chain-mail out of iron (21:80); an indication of the first use of wrought iron, this knowledge gave David a major advantage over his bronze and cast iron-armed opponents, not to mention the cultural and economic impact. Together with Solomon, David gave judgment in a case of damage to the fields (21:78) and David judged the matter between two disputants in his prayer chamber (38:21–23). Since there is no mention in the Qur'an of the wrong David did to Uriah nor any reference to Bathsheba, Muslims reject this narrative.