Exodus 7:3-5

King James Version

³ And I will harden Pharaoh's heart, and multiply my signs and my wonders in the land of Egypt.

⁴ But Pharaoh shall not hearken unto you, that I may lay my hand upon Egypt, and bring forth mine armies, and my people the children of Israel, out of the land of Egypt by great judgments.

⁵ And the Egyptians shall know that I am the Lord, when I stretch forth mine hand upon Egypt, and bring out the children of Israel from among them.