Jeremiah 1:7

But the LORD said to me, 'Do not say, 'I am only a child.' You must go to everyone I send you to and say whatever I command you.

(New International Version)

But the LORD said to me, 'Do not say, 'I am a youth,' Because everywhere I send you, you shall go, And all that I command you, you shall speak.

(New American Standard Bible)

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.

(King James Version)