2 Timothy 2:15; Titus 1:9; Titus 1:13; Titus 2:2

2 Timothy 2:15

15 Be diligent to present yourself approved to God, a worker who does not need to be ashamed, rightly dividing the word of truth.

Titus 1:9

9 holding fast the faithful word as he has been taught, that he may be able, by sound doctrine, both to exhort and convict those who contradict.

Titus 1:13

13 This testimony is true. Therefore rebuke them sharply, that they may be sound in the faith,

Titus 2:2

2 that the older men be sober, reverent, temperate, sound in faith, in love, in patience;