What does the Bible say about God choosing David as king?

In 1 Samuel 16:1-13, the Lord specifically instructs Samuel to anoint David as king, demonstrating God's sovereign choice. Unlike the first king Saul, who was chosen due to his outward appearance, God's selection of David underscores that He looks at the heart (1 Samuel 16:7). This narrative exemplifies God's providential purpose in salvation history and reveals that God's grace operates apart from human merit or expectation. As illustrated in Isaiah 42:1, God's servant, Christ, is also His 'elect,' confirming the theme of divine selection throughout Scripture.