Jer 1:7-9

7But the Lord said to me, “Do not say, ‘I am only a boy’; for you shall go to all to whom I send you, and you shall speak whatever I command you,8Do not be afraid of them, for I am with you to deliver you, says the Lord.”9Then the Lord put out his hand and touched my mouth; and the Lord said to me, “Now I have put my words in your mouth.