Revelation 15:3-4

And they sang the song of Moses, the servant of God, and the song of the Lamb; saying, Great and wonderful are thy works, O Lord God Almighty; righteous and true are thy ways, O King of Saints.

Revelation 16:5-7

And I heard the angel of the waters saying, Righteous art thou, who art, and who wast; who art perfect; because thou hast judged these:

Treasury of Scripture Knowledge

Summary

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

Bible References

If not

Revelation 15:3
And they sang the song of Moses, the servant of God, and the song of the Lamb; saying, Great and wonderful are thy works, O Lord God Almighty; righteous and true are thy ways, O King of Saints.
Revelation 16:5
And I heard the angel of the waters saying, Righteous art thou, who art, and who wast; who art perfect; because thou hast judged these: