'Innermost' in the Bible

The words of a gossip are like dainty morsels: they go down into a person's innermost parts.

The spirit of man is Yahweh's lamp, searching all his innermost parts.

Wounding blows cleanse away evil, and beatings purge the innermost parts.

The words of a whisperer are as dainty morsels, they go down into the innermost parts.