“Afterward Moses and Aaron went in and told Pharaoh, ‘Thus says the Lord God of Israel: “Let My people go, that they may hold a feast to Me in the wilderness.” ’ And Pharaoh said, ‘Who is the Lord, that I should obey His voice to let Israel go? I do not know the Lord, nor will I let Israel go’ ” (Exodus 5:1, 2, NKJV).