Exodus 5:1-3

After Moses and Aaron talked to the people, they went to the king of Egypt and said, “This is what the LORD, the God of Israel, says: ‘Let my people go so they may hold a feast for me in the desert.’ ” But the king of Egypt said, “Who is the LORD? Why should I obey him and let Israel go? I do not know the LORD, and I will not let Israel go.” Then Aaron and Moses said, “The God of the Hebrews has met with us. Now let us travel three days into the desert to offer sacrifices to the LORD our God. If we don’t do this, he may kill us with a disease or in war.”