Romans 2:20-22

20You think you can instruct the ignorant and teach children the ways of God. For you are certain that God’s law gives you complete knowledge and truth.

21Well then, if you teach others, why don’t you teach yourself? You tell others not to steal, but do you steal?

22You say it is wrong to commit adultery, but do you commit adultery? You condemn idolatry, but do you use items stolen from pagan temples?