So the anger of the LORD was kindled against Moses, and He said: "Is not Aaron the Levite your brother? I know that he can speak well. And look, he is also coming out to meet you. When he sees you, he will be glad in his heart.
Exodus 4:14
Surrounding context
4:13 But he said, "O my Lord, please send by the hand of whomever else You may send."
4:14 So the anger of the LORD was kindled against Moses, and He said: "Is not Aaron the Levite your brother? I know that he can speak well. And look, he is also coming out to meet you. When he sees you, he will be glad in his heart.
4:15 Now you shall speak to him and put the words in his mouth. And I will be with your mouth and with his mouth, and I will teach you what you shall do.