Luke 13:9

And [then] if it begins to produce, fine; but if it does not, [then] you should cut it down."

John 15:2

He will cut off [See verse 6] every branch [i.e., follower of Christ] who is in [fellowship with] me that does not bear fruit. And He will prune every branch that does bear fruit, so it will bear more fruit.

1 Thessalonians 2:15

who killed the Lord Jesus and the [Old Testament] prophets and also drove us [apostles] out [of Thessalonica and Berea. See Acts 17]. They are not pleasing to God and are hostile to all people,

Hebrews 6:8

But if the land produces [only] thorns and thistles, it is worthless and in danger of being cursed [by God], and will end up being burned.

Revelation 15:3-4

And they were singing the song of Moses, the servant of God, and the song of the Lamb. [The words were], "Your deeds are great and marvelous, O Lord, God Almighty; your ways are just and true, O King of the nations [or, "ages"].

Revelation 16:5-7

Then I heard the angel [in charge] of the waters saying, "You are just, [you] who are [in the present] and who were [in the past], O Holy One, because you have judged [that these things should happen].

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

If not

John 15:2
He will cut off [See verse 6] every branch [i.e., follower of Christ] who is in [fellowship with] me that does not bear fruit. And He will prune every branch that does bear fruit, so it will bear more fruit.
1 Thessalonians 2:15
who killed the Lord Jesus and the [Old Testament] prophets and also drove us [apostles] out [of Thessalonica and Berea. See Acts 17]. They are not pleasing to God and are hostile to all people,
Hebrews 6:8
But if the land produces [only] thorns and thistles, it is worthless and in danger of being cursed [by God], and will end up being burned.
Revelation 15:3
And they were singing the song of Moses, the servant of God, and the song of the Lamb. [The words were], "Your deeds are great and marvelous, O Lord, God Almighty; your ways are just and true, O King of the nations [or, "ages"].
Revelation 16:5
Then I heard the angel [in charge] of the waters saying, "You are just, [you] who are [in the present] and who were [in the past], O Holy One, because you have judged [that these things should happen].

General references

Luke 3:9
And even now the axe is also ready to chop down the trees at their roots [i.e., you Jews]. Every tree [i.e., person] that does not produce wholesome fruit [i.e., a godly life] will be cut down and thrown into the fire [i.e., the punishment of hell]."