1 Timothy 4:12
Let no one despise you for your youth, but set the believers an example in speech, in conduct, in love, in faith, in purity.
Then I said, “Ah, Lord God! Behold, I do not know how to speak, for I am only a youth.” But the Lord said to me, “Do not say, ‘I am only a youth’; for to all to whom I send you, you shall go, and whatever I command you, you shall speak. Do not be afraid of them, for I am with you to deliver you, declares the Lord.”
How can a young man keep his way pure? By guarding it according to your word.
2 timothy 2:22
So flee youthful passions and pursue righteousness, faith, love, and peace, along with those who call on the Lord from a pure heart.
Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear.