What does the Bible say about God's command for salvation?

In Exodus 9:1, God instructs Moses to tell Pharaoh to let His people go so that they may serve Him. This command highlights the sovereign purpose of God in salvation: He has a chosen people for whom He is the God, and His intention is to liberate them from bondage. The act of salvation is not merely for the happiness of the people but for their worship and service to God. This emphasizes that true salvation leads to a life devoted to God and His service, reflecting His glory and majesty.