2 Timothy 3:16-17
16. All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness,
17. so that the man of God may be thoroughly equipped for every good work.
2 Timothy 4:3-4
3. For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear.
4. They will turn their ears away from the truth and turn aside to myths.
Titus 1:11
They must be silenced, because they are ruining whole households by teaching things they ought not to teach--and that for the sake of dishonest gain.
Titus 2:1
You must teach what is in accord with sound doctrine.
Titus 2:15
These, then, are the things you should teach. Encourage and rebuke with all authority. Do not let anyone despise you.