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.) That is, it will be well, but if not, then after that thou shalt cut it down; namely, when Thou shalt come to judge the quick and the dead. In the mean time it is now spared.