Titus 1:9-11

9holding 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.

10For there are many insubordinate, both idle talkers and deceivers, especially those of the circumcision,

11whose mouths must be stopped, who subvert whole households, teaching things which they ought not, for the sake of dishonest gain.