It’s straight out of the Bible.
Romans 6:17
But thanks be to God that, though you used to be slaves to sin, you wholeheartedly obeyed the form of teaching to which you were entrusted.
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 11:1-2
1. Follow my example, as I follow the example of Christ.
2. I praise you for remembering me in everything and for holding to the teachings, just as I passed them on to you.
Ephesians 4:14
Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of men in their deceitful scheming.
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 1:3-4
3. As I urged you when I went into Macedonia, stay there in Ephesus so that you may command certain men not to teach false doctrines any longer
4. nor to devote themselves to myths and endless genealogies. These promote controversies rather than God's work--which is by faith.
1 Timothy 2:7
And for this purpose I was appointed a herald and an apostle--I am telling the truth, I am not lying--and a teacher of the true faith to the Gentiles.
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.
2 Timothy 2:2
And the things you have heard me say in the presence of many witnesses entrust to reliable men who will also be qualified to teach others.
Hebrews 13:8-9
8. Jesus Christ is the same yesterday and today and forever.
9. Do not be carried away by all kinds of strange teachings. It is good for our hearts to be strengthened by grace, not by ceremonial foods, which are of no value to those who eat them.
2 John 1:10
If anyone comes to you and does not bring this teaching, do not take him into your house or welcome him.
Titus 2:1
You must teach what is in accord with sound doctrine.