Matthew 15:15 - Coke's Commentary on the Holy Bible

Declare unto us this parable— The disciples, not understanding their Master's doctrine concerning meats, desired him, when they came home, to explain it. See Mark 7:17. He complied, and shewed them that meats, being of a corporeal nature, cannot defile the mind, or make a man a sinner in the sight of God, unless when used immoderately, or in opposition to the commandment of God; in which case the pollution arises from the man, and not from the meat: whereas that which proceedeth out of the man's mouth, coming from his heart, really pollutes the mind. See Matthew 15:18. The verb φρασον, rendered, declare, signifies properly, make known or explain, Comp. ch. Matthew 13:36.