He will speak for you to the people, and he will be your mouth. But you will be with him in those things that pertain to God
Other versions
King James Version
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.English Standard Version
He shall speak for you to the people, and he shall be your mouth, and you shall be as God to him.New International Version
He will speak to the people for you, and it will be as if he were your mouth and as if you were God to him.