Luke 14:34-35

Yes, salt is good; but, if the salt itself should lose its strength, what shall be used to season it?

Romans 3:12

They have all gone astray; they have one and all become depraved; there is no one who is doing good-no, not one!'

Treasury of Scripture Knowledge

Summary

Then I went to Euphrates, and digged, and took the girdle from the place where I had hid it: and, behold, the girdle was marred, it was profitable for nothing.

Bible References

It was

Luke 14:34
Yes, salt is good; but, if the salt itself should lose its strength, what shall be used to season it?
Romans 3:12
They have all gone astray; they have one and all become depraved; there is no one who is doing good-no, not one!'
Philemon 1:11
Once he was of little service to you, but now he has become of great service, not only to you, but to me as well;