‏ Exodus 7:1

Moses and Aaron go into Pharao: they turn the rod into a serpent; and the waters of Egypt into blood, which was the first plague. The magicians do the like, and Pharao’s heart is hardened.

1And the Lord said to Moses: “Behold, I have appointed you as the god of Pharaoh. And Aaron, your brother, will be your prophet.
7:1 The god of Pharao: Viz., to be his judge; and to exercise a divine power, as God’s instrument, over him and his people.(Challoner)
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