Exodus 8:27-29

New Revised Standard Version, Anglicised Catholic Edition

²⁷ We must go a three days’ journey into the wilderness and sacrifice to the Lord our God as he commands us.’ ²⁸ So Pharaoh said, ‘I will let you go to sacrifice to the Lord your God in the wilderness, provided you do not go very far away. Pray for me.’ ²⁹ Then Moses said, ‘As soon as I leave you, I will pray to the Lord that the swarms of flies may depart tomorrow from Pharaoh, from his officials, and from his people; only do not let Pharaoh again deal falsely by not letting the people go to sacrifice to the Lord.’