Nothing 'new'...
Romans 15:4
For everything that was written in the past was written to teach us, so that through endurance and the encouragement of the Scriptures we might have hope.
Romans 16:17
I urge you, brothers, to watch out for those who cause divisions and put obstacles in your way that are contrary to the teaching you have learned. Keep away from them.
1 Corinthians 4:17
For this reason I am sending to you Timothy, my son whom I love, who is faithful in the Lord. He will remind you of my way of life in Christ Jesus, which agrees with what I teach everywhere in every church.
1 Corinthians 11:2
I praise you for remembering me in everything and for holding to the teachings, just as I passed them on to you.
2 Thessalonians 2:15
So then, brothers, stand firm and hold to the teachings we passed on to you, whether by word of mouth or by letter.
2 Thessalonians 3:6
In the name of the Lord Jesus Christ, we command you, brothers, to keep away from every brother who is idle and does not live according to the teaching you received from us.
1 Timothy 4:6
If you point these things out to the brothers, you will be a good minister of Christ Jesus, brought up in the truths of the faith and of the good teaching that you have followed.
2 Timothy 1:13
What you heard from me, keep as the pattern of sound teaching, with faith and love in Christ Jesus.