Exodus 4:14-17

14Then the Lord’s anger burned against Moses, and he said, “Isn’t Aaron the Levite your brother? I know that he can speak well. And also, he is on his way now to meet you. He will rejoice when he sees you.

15You will speak with him and tell him what to say. I will help both you and him to speak and will teach you both what to do.

16He will speak to the people for you. He will serve as a mouth for you, and you will serve as God to him.

17And take this staff in your hand that you will perform the signs with.”