Titus 1:14-16

14 instead of paying attention to Jewish myths and regulations of people who have repudiated the truth. [AH]

15 To the clean all things are clean, but to those who are defiled and unbelieving nothing is clean; in fact, both their minds and their consciences are tainted. [AI]

16 They claim to know God, but by their deeds they deny him. They are vile and disobedient and unqualified for any good deed.