Titus 2:1
Do you, however, speak of such subjects as properly have a place in sound Christian teaching.
1 Timothy 1:10
for the immoral, for people guilty of sodomy, for slave-dealers, for liars, for perjurers, and for whatever else is opposed to sound Christian teaching--
Titus 1:9
who holds doctrine that can be relied on as being in accordance with the accepted Teaching; so that he may be able to encourage others by sound teaching, as well as to refute our opponents.
1 Timothy 6:3
Any one who teaches otherwise, and refuses his assent to sound instruction--the instruction of our Lord Jesus Christ--and to the teaching of religion,
2 Timothy 1:13
Keep before you, as an example of sound teaching, all that you learnt from me as you listened with that faith and love which come from union with Christ Jesus.
Titus 2:11-14
For the loving-kindness of God has been revealed, bringing Salvation for all;
Titus 3:8
How true that saying is! And it is on these subjects that I desire you to lay especial stress, so that those who have learned to trust in God may be careful to devote themselves to doing good. Such subjects are excellent in themselves, and of real use to mankind.