Exodus 4: 10-20

 10 Then Moses said to the Lord, “Please, Lord, I have never been eloquent, neither recently nor in time past, nor since You have spoken to Your servant; for I am slow of speech and slow of tongue.” 11 But the Lord said to him, “Who has made the human mouth? Or who makes anyone unable to speak or deaf, or able to see or blind? Is it not I, the Lord? 12 Now then go, and I Myself will be with your mouth, and instruct you in what you are to say.” 13 But he said, “Please, Lord, now send the message by whomever You will.”
14 Then the anger of the Lord burned against Moses, and He said, “Is there not your brother Aaron the Levite? I know that he speaks fluently. And moreover, behold, he is coming out to meet you; when he sees you, he will be overjoyed. 15 So you are to speak to him and put the words in his mouth; and I Myself will be with your mouth and his mouth, and I will instruct you in what you are to do. 16 He shall speak for you to the people; and he will be as a mouth for you and you will be as God to him. 17 And you shall take in your hand this staff, with which you shall perform the signs.”
18 Then Moses departed and returned to his father-in-law Jethro, and said to him, “Please, let me go, that I may return to my brothers who are in Egypt, and see if they are still alive.” And Jethro said to Moses, “Go in peace.” 19 Now the Lord said to Moses in Midian, “Go back to Egypt, for all the men who were seeking your life are dead.” 20 So Moses took his wife and his sons and mounted them on a donkey, and returned to the land of Egypt. Moses also took the staff of God in his hand. Exodus 4: 10- 20 taken from the NASB