Jeremiah 1:7 in the King James Version
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.
Context
6 Then I said, “Ah, Lord GOD! Behold, I don’t know how to speak; for I am a child.”
7 But the LORD said to me, “Don’t say, ‘I am a child;’ for you must go to whomever I send you, and you must say whatever I command you.
8 Don’t be afraid because of them, for I am with you to rescue you,” says the LORD.