Sheol and Abaddon are before YHVH: how much more then the hearts of the children of men?
Proverbs 15:11

Sheol isn't what we normally think of as "Hell", but the grave where the dead await judgment.

Abaddon is probably correctly translated as destruction in the KJV. It's also used in the Psalms, Job, and Revelation, where it is applied to "the angel of the bottomless pit". I believe this word refers to the Lake of Fire into which Sheol and death will one day be cast and destroyed.

Sheol, Abaddon, and death (mavet) all go together.