Luke 14:34-35

Salt is good; but if the salt have lost it's savor, wherewith shall it be seasoned?

Romans 3:12

They are all gone out of the way, they are become unprofitable, there is none that practiseth goodness, 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
Salt is good; but if the salt have lost it's savor, wherewith shall it be seasoned?
Romans 3:12
They are all gone out of the way, they are become unprofitable, there is none that practiseth goodness, no not one.
Philemon 1:11
who was formerly unprofitable to thee, but now profitable both to thee and to me; whom I have sent back to thee: