Exodus 5:1-3

1Afterward, Moses and Aaron went and said to Pharaoh, “This is what Adonai, God of Israel, says: Let My people go, so that they may hold a feast for Me in the wilderness.”

2But Pharaoh said, “Who is Adonai, that I should listen to His voice and let Israel go? I do not know Adonai, and besides, I will not let Israel go.”

3They answered, “The God of the Hebrews has met with us. Please let us take a three-day journey into the wilderness, so we may sacrifice to Adonai our God, or else He may strike us with pestilence or with the sword.”