Adam Clarke's Commentary on the Bible - Exodus 4:16
He shall be thy spokesman - Literally, He shall speak for thee (or in thy stead) to the people. He shall be to thee instead of a mouth - He shall convey every message to the people; and thou shalt be to him instead of God - thou shalt deliver to him what I communicate to thee. read more
Adam Clarke's Commentary on the Bible - Exodus 4:15
I will be with thy mouth, and with his mouth - Ye shall be both, in all things which I appoint you to do in this business, under the continual inspiration of the Most High. read more