He spoke also this parable;
A certain man had a fig tree planted in his vineyard; and he came and sought fruit thereon, and found none.
All Commentaries on Luke 13:6 Go To Luke 13
Augustine of Hippo
AD 430
Or, in another sense, the fig tree is the race of mankind. For the first man after he had sinned concealed with fig leaves his nakedness, that is, the members from which we derive our birth.
Or, the husbandmen who intercedes is every holy man who ho 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.
That is, it will be well, but if not, then after that you shall cut it down; namely, when you shall come to judge the quick and the dead. In the mean time it is now spared.