Titus 2:1

But speak thou the things which befit the sound doctrine:

1 Timothy 1:10

for fornicators, for abusers of themselves with men, for menstealers, for liars, for false swearers, and if there be any other thing contrary to the sound doctrine;

Titus 1:9

holding to the faithful word which is according to the teaching, that he may be able to exhort in the sound doctrine, and to convict the gainsayers.

1 Timothy 6:3

If any man teacheth a different doctrine, and consenteth not to sound words, even the words of our Lord Jesus Christ, and to the doctrine which is according to godliness;

2 Timothy 1:13

Hold the pattern of sound words which thou hast heard from me, in faith and love which is in Christ Jesus.

Titus 2:11-14

For the grace of God hath appeared, bringing salvation to all men,

Titus 3:8

Faithful is the saying, and concerning these things I desire that thou affirm confidently, to the end that they who have believed God may be careful to maintain good works. These things are good and profitable unto men:

Treasury of Scripture Knowledge

Summary

But speak thou the things which become sound doctrine:

Bible References

General references

Titus 2:11
For the grace of God hath appeared, bringing salvation to all men,
Titus 1:9
holding to the faithful word which is according to the teaching, that he may be able to exhort in the sound doctrine, and to convict the gainsayers.
Titus 3:8
Faithful is the saying, and concerning these things I desire that thou affirm confidently, to the end that they who have believed God may be careful to maintain good works. These things are good and profitable unto men:
1 Timothy 1:10
for fornicators, for abusers of themselves with men, for menstealers, for liars, for false swearers, and if there be any other thing contrary to the sound doctrine;
1 Timothy 6:3
If any man teacheth a different doctrine, and consenteth not to sound words, even the words of our Lord Jesus Christ, and to the doctrine which is according to godliness;
2 Timothy 1:13
Hold the pattern of sound words which thou hast heard from me, in faith and love which is in Christ Jesus.

American Standard Version Public Domain