Augustine of Hippo
Catena Aurea · Matthäusevangelium 5
Agree with thine adversary quickly, whiles thou art in the way with him; lest at any time the adversary deliver thee to the judge, and the judge deliver thee to the officer, and thou be cast into prison. Verily I say unto thee, Thou shalt by no means come out thence, till thou hast paid the uttermost farthing.
(ubi sup.) Or it is an expression to denote that there is nothing that shall go unpunished; as we say ‘To the dregs,’ when we are speaking of any thing so emptied that nothing is left in it. Or by the last farthing (quadrans.) may be denoted earthly sins. For the fourth and last element of this world is earth. Paid, that is in eternal punishment; and until used in the same sense as in that, Sit thou on my right hand until I make thy enemies thy footstool; (Ps. 110:1.) for He does not cease to reign when His enemies are put under His feet. So here, until thou hast paid, is as much as to say, thou shalt never come out thence, for that he is always paying the very last farthing while he is enduring the everlasting punishment of earthly sins.