Gregory the Great
Catena Aurea · Lukasevangelium 19
And he went into the temple, and began to cast out them that sold therein, and them that bought; Saying unto them, It is written, My house is the house of prayer: but ye have made it a den of thieves. And he taught daily in the temple. But the Chief Priests and the Scribes and the chief of the people sought to destroy him, And could not find what they might do: for all the people were very attentive to hear him.
(ut sup.) And these make the house of God a den of thieves, because when corrupt men hold religious offices, they slay with the sword of their wickedness their neighbours, whom they ought to raise to life by the intercession of their prayers. The temple also is the soul of the faithful, which if it put forth corrupt thoughts to the injury of a neighbour, then is it become as it were a lurking place of thieves. But when the soul of the faithful is wisely instructed to shun evil, truth teaches daily in the temple.