Titus 1:10-16

For there are also many disobedient, vain talkers, and seducers: especially they who are of the circumcision: Who must be reproved, who subvert whole houses, teaching things which they ought not, for filthy lucre's sake. One of them a prophet of their own, said, The Cretians are always liars, evil beasts, slothful bellies. This testimony is true. Wherefore rebuke them sharply, that they may be sound in the faith; Not giving heed to Jewish fables and commandments of men, who turn themselves away from the truth. All things are clean to the clean: but to them that are defiled, and to unbelievers, nothing is clean: but both their mind and their conscience are defiled. They profess that they know God: but in their works they deny him; being abominable, and incredulous, and to every good work reprobate.