Proverbs 30:16 – There are three things that are never satisfied; Four that don’t say, ‘Enough:’ Sheol, the barren womb; The earth that is not satisfied with water; The fire that doesn’t say, ‘Enough.’ — World English
Sheol — the oblivious realm of death — never says: “Enough”. Some have viewed this scripture as saying sheol is eternal; actually there is nothing here that says that sheol is eternal, only that as long as it exists, it is never satisfied. The Hebrew word translated “never” (both in Proverbs 27:20 and 30:16) is Bal, which means “not, hardly, else.” If this should mean that sheol would eternally continue claim victims, then death would never cease, but we are told that death will be no more. — Revelation 21:4.