What does the Bible say about David's faith in facing Goliath?

In the story of David and Goliath, David's faith is highlighted as he confronts Goliath with courage based on his trust in God. When David faced the lion and the bear, he relied on God's prior deliverance, reinforcing his confidence to confront Goliath. David asked, 'Who is this uncircumcised Philistine, that he should defy the armies of the living God?' This indicates that David’s confidence stemmed from his understanding of God's glory and covenant, believing that God would fight on behalf of His people. His faith was not in his own strength, but in the promises of God.