Proverbs 20:9-11

⁹Who will boast that he has a pure heart? or who will boldly say that he is pure from sins?

¹⁰A large and small weight, and various measures, are even both of them unclean before the Lord; and so is he that makes them.

¹¹A youth when in company with a godly man, will be restrained in his devices, and then his way will be straight.