Isaiah 55:9 applies the heavens-higher-than-earth comparison to God's ways, reinforcing the theme of unsearchable depth.

Job 11:8 directly mirrors the 'higher than heaven, deeper than Sheol' language, applying it to God's unsearchable wisdom.

In Romans 11:33, Paul echoes this same 'unsearchable' language, but applied to God's judgments rather than a king's heart.

Psalm 103:11 uses the same 'heavens high above earth' image to describe God's immeasurable love, paralleling the unsearchable heart of a king.