Exodus 5:1, 3

After that Moses and Aaron approached Pharaoh. They said, “GOD, the God of Israel, says, ‘Free my people so that they can hold a festival for me in the wilderness.’”

They said, “The God of the Hebrews has met with us. Let us take a three-day journey into the wilderness so we can worship our GOD lest he strike us with either disease or death.”