Cyril of Alexandria — as excerpted in the Catena Aurea on Luke 11:37-44

“Now our Lord might also have used other words to admonish the foolish Pharisee, but he seizes the opportunity and framed his reproof from the things that were ready before him. At the hour, namely, of meals He takes for His example the cup and the platter, pointing out that it became the sincere servants of God to be washed and clean, not only from bodily impurity, but also from that which lies concealed within the power of the soul, just as any of the vessels which are used for the table ought to be free from all inward defilement.”