Luke 14:34-35

Salt is excellent indeed: but if salt becomes insipid, what will restore its flavour?

Romans 3:12

All have swerved, one and all have gone wrong, no one does good, not a single 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 excellent indeed: but if salt becomes insipid, what will restore its flavour?
Romans 3:12
All have swerved, one and all have gone wrong, no one does good, not a single one.
Philemon 1:11
Once you found him a worthless character, but now-a-days he is worth something to you and me.