Matthew 21:20

And when the disciples saw it, they marvelled, saying, How soon is the fig tree withered away! The Vulg. omits fig tree, which is found in the Greek and Syriac. This took place on the following day, for Christ on the Monday returning from Bethany to Jerusalem cursed the fig tree: after that He cast out the buyers from the Temple, and taught there: in the evening He returned from the city to Bethany: on the Tuesday morning, as the disciples were returning with Him from Bethany to Jerusalem, they saw the fig tree dried up, and then they cried in wonder, How immediately is it dried up! That this is the order in which the events happened is plain from Mark xi. 19, 20.

Symbolically : Christ cursed the fig tree, because a fig was the tree which God forbade, of which Adam ate, and ruined himself and his posterity, as the learned men whom I have cited (Gen 2:9) think with probability.

Allegorically : the withered fig tree denotes the Jews, who when Christ came, being unbelieving, lost the sap of faith and grace, and so bring forth no fruits of good works. Thus Origen.

Tropologically : the fig tree, full of leaves but without figs, denotes believers who have the leaves of a profession of the faith but lack the solid fruit of virtues, and so will be cursed by Christ. Thus Origen.