The barren fig tree teaches divine patience and the urgency of repentance.

Luke 13:6–9

⁶He 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.

⁷Then 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?

⁸And he answering said unto him, Lord, let it alone this year also, till I shall dig about it, and dung it:

⁹And if it bear fruit, well: and if not, then after that thou shalt cut it down.