Jeremiah 1:5-7

Young's Literal Translation

⁵ `Before I form thee in the belly, I have known thee; and before thou comest forth from the womb I have separated thee, a prophet to nations I have made thee.'

⁶ And I say, `Ah, Lord Jehovah! lo, I have not known -- to speak, for I [am] a youth.'

⁷ And Jehovah saith unto me, `Do not say, I [am] a youth, for to all to whom I send thee thou goest, and all that I command thee thou speakest.