Jeremiah 1:5-7King James Version (KJV)
5 Before I formed thee in the belly I knew thee; and before thou camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations.
6 Then said I, Ah, Lord God! behold, I cannot speak: for I am a child.
7 But the Lord said unto me, Say not, I am a child: for thou shalt go to all that I shall send thee, and whatsoever I command thee thou shalt speak.