Titus 1:9-11

9Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convict those who contradict.1 10For there are many rebellious and vain talkers and deceivers, especially they of the circumcision: 11Whose mouths must be stopped, who subvert whole houses, teaching things which they ought not, for the sake of dishonest gain.