Exodus 4:10-16

Then Moses said to the LORD, “O my Lord, I am not an eloquent man, neither in the past nor since you have spoken to your servant, for I am slow of speech and slow of tongue.” The LORD said to him, “Who gave a mouth to man, or who makes a person mute or deaf or seeing or blind? Is it not I, the LORD? So now go, and I will be with your mouth and will teach you what you must say.” But Moses said, “O my Lord, please send anyone else whom you wish to send!” Then the LORD became angry with Moses, and he said, “What about your brother Aaron the Levite? I know that he can speak very well. Moreover, he is coming to meet you, and when he sees you he will be glad in his heart. “So you are to speak to him and put the words in his mouth. And as for me, I will be with your mouth and with his mouth, and I will teach you both what you must do. He will speak for you to the people, and it will be as if he were your mouth and as if you were his God.