Titus 1:13-16
13This witness is true. Wherefore rebuke them sharply, that they may be sound in the faith;
14Not giving heed to Jewish fables, and commandments of men, that turn from the truth.
15Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.
16They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.
(KJV)