GOD told Moses that Aaron his brother is going to be his mouthpiece while he (Moses) will be a God to him.

Exodus 4:16 KJV
And he shall be thy spokesman unto the people: and he shall be, even he shall be to thee instead of a mouth, and thou shalt be to him instead of God.

Exodus 7:1 KJV AND the LORD said unto Moses, see, I have made thee a god to Pharaoh: and Aaron thy brother shall be thy prophet.

Psalm 82:6 KJV I have said, Ye are gods; and all of you are children of the most High.
7. But you shall die like men, and fall like one of the princes