45 But hear the marvel that our Lord wrought. Because that Pharisee supposed that our Lord did not know that the woman who touched Him was a sinner; our Lord made the lips of the Pharisee like the strings of a harp; and by his very lips He sang how she was trampling under foot his sins, though he knew it not. And he who as though he knew had blamed, was found to be a harp, whereto another could sing of that which he knew. For our Lord compared the sins of the sinful woman to five hundred dinars, and caused them to pass into the hearing of the Pharisee by the parable which he heard; and again brought them forth from his mouth in the judgment he gave; though Simon knew not, when he was judging, that those five hundred dinars denoted the sins of the sinful woman. And (the Pharisee) who thought concerning our Lord that He had not knowledge of her sins, was himself found not to have knowledge of them, when he heard of those debts in the parable, and gave judgment concerning them with his voice. But when it was explained to him at last by our Lord, then the Pharisee knew that alike his ears and also his lips were, as it were, instruments for our Lord, through which He might sing the glories of His knowledge.
For this Pharisee was the fellow of those scribes, whose sentence by their own mouths our Lord gave against them— What then will the Lord of the vineyard do to those husbandmen? They say unto Him, against themselves:— He will terribly destroy them, and will hire out the vineyard to husbandmen who will render unto Him the fruit in its season. This is the Godhead to which all things are easy, which by the mouths, the very mouths that blasphemed it, pronounced the sentence of those very mouths against them.
Source: On Our Lord (New Advent)