Exodus 4:15
“And thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do.”
And he said, O my Lord, send, I pray thee, by the hand of him whom thou wilt send.
And the anger of the Lord was kindled against Moses, and he said, Is not Aaron the Levite thy brother? I know that he can speak well. And also, behold, he cometh forth to meet thee: and when he seeth thee, he will be glad in his heart.
And thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do.
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.
And thou shalt take this rod in thine hand, wherewith thou shalt do signs.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Then the Lord put forth his hand, and touched my mouth. And the Lord said unto me, Behold, I have put my words in thy mouth.”
“And the Lord said unto Moses, See, I have made thee a god to Pharaoh: and Aaron thy brother shall be thy prophet.”
“And he said, Certainly I will be with thee; and this shall be a token unto thee, that I have sent thee: When thou hast brought forth the people out of Egypt, ye shall serve God upon this mountain.”
“But when they deliver you up, take no thought how or what ye shall speak: for it shall be given you in that same hour what ye shall speak.”
“The preparations of the heart in man, and the answer of the tongue, is from the Lord.”