Exodus 4:13

10 And Moses saith unto Jehovah, `O, my Lord, I [am] not a man of words, either yesterday, or before, or since Thy speaking unto Thy servant, for I [am] slow of mouth, and slow of tongue.`

11 And Jehovah saith unto him, `Who appointed a mouth for man? or who appointeth the dumb, or deaf, or open, or blind? is it not I, Jehovah?

12 and now, go, and I -- I am with thy mouth, and have directed thee that which thou speakest;`

13 and he saith, `O, my Lord, send, I pray thee, by the hand Thou dost send.`

14 And the anger of Jehovah burneth against Moses, and He saith, `Is not Aaron the Levite thy brother? I have known that he speaketh well, and also, lo, he is coming out to meet thee; when he hath seen thee, then he hath rejoiced in his heart,

15 and thou hast spoken unto him, and hast set the words in his mouth, and I -- I am with thy mouth, and with his mouth, and have directed you that which ye do;

16 and he, he hath spoken for thee unto the people, and it hath come to pass, he -- he is to thee for a mouth, and thou -- thou art to him for God;