Titus 1:9-14

He must hold firmly to the trustworthy word [of God] as it was taught to him, so that he will be able both to give accurate instruction in sound [reliable, error-free] doctrine and to refute those who contradict [it by explaining their error]. For there are many rebellious men who are empty talkers [just windbags] and deceivers; especially those of the circumcision [those Jews who insist that Gentile believers must be circumcised and keep the Law in order to be saved]. They must be silenced, because they are upsetting whole families by teaching things they should not teach for the purpose of dishonest financial gain. One of them [Epimenides, a Cretan], a prophet of their own, said, “Cretans are always liars, evil beasts, lazy gluttons.” This description is true. So rebuke them sharply so that they will be sound in the faith and free from doctrinal error, not paying attention to Jewish myths and the commandments and rules of men who turn their backs on the truth.