Luke 13:6–9. "The Fruitful Christian"
“And he told this parable: “A man had a fig tree planted in his vineyard, and he came seeking fruit on it and found none. And he said to the vinedresser, ‘Look, for three years now I have come seeking fruit on this fig tree, and I find none. Cut it down. Why should it use up the ground?’ And he answered him, ‘Sir, let it alone this year also, until I dig around it and put on manure. Then if it should bear fruit next year, well and good; but if not, you can cut it down.’””
(Luke 13:6–9 ESV)