Exodus 7:2-4

New Revised Standard Version, Anglicised Catholic Edition

² You shall speak all that I command you, and your brother Aaron shall tell Pharaoh to let the Israelites go out of his land. ³ But I will harden Pharaoh’s heart, and I will multiply my signs and wonders in the land of Egypt. ⁴ When Pharaoh does not listen to you, I will lay my hand upon Egypt and bring my people the Israelites, company by company, out of the land of Egypt by great acts of judgement.