Gregory the Great
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.
(ubi. sup.) But with great fear and trembling should we hear the word which follows, Cut it down, why cumbereth it the ground. For every one according to his measure, in whatsoever station of life he is, except he shew forth the fruits of good works, like an unfruitful tree, cumbereth the ground; for wherever he is himself placed, he there denies to another the opportunity of working.