Titus 1:9

Keeping to the true word of the teaching, so that he may be able to give comfort by right teaching and overcome the arguments of the doubters.

1 Timothy 1:10

For those who go after loose women, for those with unnatural desires, for those who take men prisoners, who make false statements and false oaths, and those who do any other things against the right teaching,

2 Thessalonians 2:15

So then, brothers, be strong in purpose, and keep the teaching which has been given to you by word or by letter from us.

1 Timothy 6:3

If any man gives different teaching, not in agreement with the true words of our Lord Jesus Christ, and with the teaching which is in agreement with true religion,

2 Timothy 1:13

Keep the form of those true words which you had from me, in faith and love which is in Christ Jesus.

1 Timothy 1:15

It is a true saying, in which all may put their faith, that Christ Jesus came into the world to give salvation to sinners, of whom I am the chief:

Titus 2:1

But let your words be in agreement with true and right teaching:

Job 2:3

And the Lord said to the Satan, Have you taken note of my servant Job, for there is no one like him on the earth, a man without sin and upright, fearing God and keeping himself far from evil? and he still keeps his righteousness, though you have been moving me to send destruction on him without cause.

Job 27:6

I will keep it safe, and will not let it go: my heart has nothing to say against any part of my life.

Proverbs 23:23

Get for yourself that which is true, and do not let it go for money; get wisdom and teaching and good sense.

Acts 18:28

For he overcame the Jews in public discussion, making clear from the holy Writings that the Christ was Jesus.

1 Corinthians 14:24

But if all are teaching as prophets, and a man without faith or knowledge comes in, he is tested by all, he is judged by all;

1 Thessalonians 5:21

Let all things be tested; keep to what is good;

1 Timothy 1:19

Keeping faith, and being conscious of well-doing; for some, by not doing these things, have gone wrong in relation to the faith:

1 Timothy 4:9

This is a true saying, in which all may put their faith.

2 Timothy 2:2

And the things which I have said to you before a number of witnesses, give to those of the faith, so that they may be teachers of others.

2 Timothy 2:25

Gently guiding those who go against the teaching; if by chance God may give them a change of heart and true knowledge,

2 Timothy 4:3

For the time will come when they will not take the true teaching; but, moved by their desires, they will get for themselves a great number of teachers for the pleasure of hearing them;

Titus 1:11

By whom some families have been completely overturned; who take money for teaching things which are not right; these will have to be stopped.

Titus 2:7-8

In all things see that you are an example of good works; holy in your teaching, serious in behaviour,

Jude 1:3

My loved ones, while my thoughts were full of a letter which I was going to send you about our common salvation, it was necessary for me to send you one requesting you with all my heart to go on fighting strongly for the faith which has been given to the saints once and for ever.

Revelation 2:25

But what you have, keep safe till I come.

Revelation 3:3

Keep in mind, then, the teaching which was given to you, and be ruled by it and have a change of heart. If then you do not keep watch, I will come like a thief, and you will have no knowledge of the hour when I will come on you.

Revelation 3:11

I come quickly: keep that which you have, so that no one may take your crown.

Treasury of Scripture Knowledge

Summary

Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers.

Bible References

Fast

1 Timothy 1:15
It is a true saying, in which all may put their faith, that Christ Jesus came into the world to give salvation to sinners, of whom I am the chief:
1 Timothy 4:9
This is a true saying, in which all may put their faith.
1 Timothy 6:3
If any man gives different teaching, not in agreement with the true words of our Lord Jesus Christ, and with the teaching which is in agreement with true religion,
2 Timothy 2:2
And the things which I have said to you before a number of witnesses, give to those of the faith, so that they may be teachers of others.

Sound

Titus 2:1
But let your words be in agreement with true and right teaching:
1 Timothy 1:10
For those who go after loose women, for those with unnatural desires, for those who take men prisoners, who make false statements and false oaths, and those who do any other things against the right teaching,
1 Timothy 6:3
If any man gives different teaching, not in agreement with the true words of our Lord Jesus Christ, and with the teaching which is in agreement with true religion,
2 Timothy 4:3
For the time will come when they will not take the true teaching; but, moved by their desires, they will get for themselves a great number of teachers for the pleasure of hearing them;

To convince

Titus 1:11
By whom some families have been completely overturned; who take money for teaching things which are not right; these will have to be stopped.
Acts 18:28
For he overcame the Jews in public discussion, making clear from the holy Writings that the Christ was Jesus.
1 Corinthians 14:24
But if all are teaching as prophets, and a man without faith or knowledge comes in, he is tested by all, he is judged by all;
2 Timothy 2:25
Gently guiding those who go against the teaching; if by chance God may give them a change of heart and true knowledge,

General references

Leviticus 14:42
And they will take other stones and put them in place of those stones, and he will take other paste and put it on the walls of the house.
Leviticus 15:8
And if liquid from the mouth of the unclean man comes on to him who is clean, then he is to have his clothing washed and his body bathed in water and be unclean till evening.
Ezekiel 44:9
For this cause the Lord has said, No man from a strange land, without circumcision of heart and flesh, of all those who are living among the children of Israel, is to come into my holy place.
Haggai 2:11
These are the words of the Lord of armies: Put now a point of law to the priests, saying,
Titus 2:1
But let your words be in agreement with true and right teaching:

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain