Luke 13:9
And if it bear fruit, well: and if not, then after that thou shalt cut it down.
Cross-reference
Luke 3:9 uses the exact same imagery: every tree not bearing good fruit is cut down and thrown into fire — directly parallel to the fig tree.
In John 15:2, Jesus says every branch not bearing fruit is taken away — the same principle as the fig tree being cut down.
Hebrews 6:8 describes land producing thorns being burned — the same principle of unfruitfulness leading to destruction.
Matthew 13:23 describes seed on good soil bearing abundant fruit — the positive counterpart to the fig tree's failure to bear fruit.
In Ezra 9:14, Ezra fears total consumption if they continue sinning — parallels the threat to cut down the fruitless fig tree.
In Ezra 9:15, Ezra acknowledges God's justice in their guilt — mirrors the vinedresser's acceptance that judgment follows barrenness.