Aaron told them everything the Lord had said to Moses, and he performed the signs before the people.
So Moses went and summoned the elders of the people. When he set before them all that the Lord had ordered him to tell them,
“But,” objected Moses, “suppose they do not believe me or listen to me? For they may say, ‘The Lord did not appear to you.’”
You will speak to him and put the words in his mouth. I will assist both you and him in speaking and teach you both what you are to do.
He will speak to the people for you: he will be your spokesman, and you will be as God to him.