Titus 1:12

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 those who contradict him.

For there are also many unruly men, vain talkers and deceivers, especially those of the circumcision,

whose mouths must be stopped: men who overthrow whole houses, teaching things which they ought not, for dishonest gain’s sake.

This testimony is true. For this cause, reprove them sharply, that they may be sound in the faith,

not paying attention to Jewish fables and commandments of men who turn away from the truth.

To the pure, all things are pure, but to those who are defiled and unbelieving, nothing is pure; but both their mind and their conscience are defiled.