Pseudo-Chrysostom — as excerpted in the Catena Aurea on Matthew 23:25-26

“Or, He means that the Jews whenever they were to enter the temple or to offer sacrifice, or on any festivals, used to wash themselves, their clothes, and their vessels, but none cleansed himself from his sins; but God neither commends bodily cleanliness, nor condemns the contrary. But suppose foulness of person or of vessels were offensive to God, which must become foul by being used, how much more does He not abhor foulness of conscience, which we may, if we will, keep ever pure?”