Exodus 4:10-17

Moses said: I beseech thee, Lord, I am not eloquent from yesterday and the day before; and since thou hast spoken to thy servant, I have more impediment and slowness of tongue. The Lord said to him: Who made man's mouth? Or who made the dumb and the deaf, the seeing and the blind? Did not I? Go therefore, and I will be in thy mouth: and I will teach thee what thou shalt speak. But he said: I beseech thee, Lord, send whom thou wilt send. The Lord being angry at Moses, said: Aaron the Levite is thy brother. I know that he is eloquent: behold, he cometh forth to meet thee, and seeing thee shall be glad at heart. Speak to him, and put my words in his mouth: and I will be in thy mouth, and in his mouth, and will shew you what you must do. He shall speak in thy stead to the people, and shall be thy mouth: but thou shalt be to him in those things that pertain to God. And take this rod in thy hand, wherewith thou shalt do the signs.