Matthew 23:26
You blind Pharisee! First clean the inside of the cup and the plate, that the outside also may be clean. The order of cleansing: inside first, then the outside will also be clean. The teaching of Matthew 15:11 (what comes out of the mouth defiles) applied to the Pharisees directly: the inside that is cleaned produces the outside cleanness that the ritual purity system seeks by external means.