Exodus 4:12-14
4:12 So now go, and I will be with your mouth
and will teach you
what you must say.”
4:13 But Moses said, “O my Lord, please send anyone else whom you wish to send!”
4:14 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.