And Aaron spoke all the words which the Lord had spoken to Moses and did the signs in the sight of the people.
So Moses came and called for the elders of the people and laid before them all these words which the Lord commanded him.
Then Moses answered, “But behold, they will not believe me, nor listen to my voice. For they will say, ‘The Lord has not appeared to you.’ ”
You shall speak to him and put the words in his mouth, and I will be with your mouth, and with his mouth, and will teach you what you must do.
What’s more, he will be your spokesman to the people, and he will be as a mouth for you, and you will be as God to him.