Augustine of Hippo
Catena Aurea · Lukasevangelium 13
He spake also this parable; A certain man had a fig tree planted in his vineyard; and he came and sought fruit thereon, and found none. Then said he unto the dresser of his vineyard, Behold, these three years I come seeking fruit on this fig tree, and find none; cut it down: why cumbereth it the ground? And he answering said unto him, Lord, let it alone this year also, till I shall dig about it, and dung it: And if it bear fruit, well: and if not, then after that thou shalt cut it down. PSEUDO-BASIL. (De Pœnit.) For it is the part of God’s mercy not silently to inflict punishment, but to send forth threatenings to recall the sinner to repentance, as He did to the men of Nineveh, and now to the dresser of the vineyard, saying, Cut it down, exciting him indeed to the care of it, and stirring up the barren soil to bring forth the proper fruits.
(ubi sup.) Or, the husbandman who intercedes is every holy man who within the Church prays for them that are without the Church, saying, O Lord, O Lord, let it alone this year, that is, for that time vouchsafed under grace, until I dig about it. To dig about it, is to teach humility and patience, for the ground which has been dug is lowly. The dung signifies the soiled garments, but they bring forth fruit. The soiled garment of the dresser, is the grief and mourning of sinners; for they who do penance and do it truly are in soiled garments.