How do we know God's sovereignty is true in the Exodus story?

The sovereignty of God is powerfully illustrated in the Exodus narrative through His control over Pharaoh's heart. Despite Pharaoh repeatedly pleading to let the Israelites go, the Lord hardens Pharaoh’s heart, ensuring that God's purposes are fulfilled through the subsequent plagues and ultimate liberation of His people. This not only showcases God’s power over earthly rulers but also demonstrates that His plan of redemption will prevail against all opposition. Moreover, this event affirms the doctrine of divine sovereignty, emphasizing that God orchestrates events according to His will for His elect.