Exodus 7:1-3
Exodus 7:1-3 ASV
And Jehovah said unto Moses, See, I have made thee as God to Pharaoh; and Aaron thy brother shall be thy prophet. Thou shalt speak all that I command thee; and Aaron thy brother shall speak unto Pharaoh, that he let the children of Israel go out of his land. And I will harden Pharaoh’s heart, and multiply my signs and my wonders in the land of Egypt.