Exodus 7:2-4 New King James Version (NKJV)
2 You shall speak all that I command you. And Aaron your brother shall tell Pharaoh to send the children of Israel out of his land. 3 And I will harden Pharaoh’s heart, and multiply My signs and My wonders in the land of Egypt. 4 But Pharaoh will not heed you, so that I may lay My hand on Egypt and bring My [a]armies and My people, the children of Israel, out of the land of Egypt by great judgments.