Jeremiah 1:4-7

Then the word of the LORD came to me, saying: “Before I formed you in the womb I knew you; Before you were born I sanctified you; I ordained you a prophet to the nations.” Then said I: “Ah, Lord GOD! Behold, I cannot speak, for I am a youth.” But the LORD said to me: “Do not say, ‘I am a youth,’ For you shall go to all to whom I send you, And whatever I command you, you shall speak.