Proverbs 25:3

The heavens for height, and the earth for depth, And the heart of kings -- are unsearchable.

1 Kings 4:29

And God giveth wisdom to Solomon, and understanding, very much, and breadth of heart, as the sand that is on the edge of the sea;

Psalm 103:11

For, as the height of the heavens is above the earth, His kindness hath been mighty over those fearing Him.

Isaiah 7:11

Ask for thee a sign from Jehovah thy God, Make deep the request, or make it high upwards.'

Isaiah 55:9

For high have the heavens been above the earth, So high have been My ways above your ways, And My thoughts above your thoughts.

Romans 8:39

nor things about to be, nor height, nor depth, nor any other created thing, shall be able to separate us from the love of god, that is in Christ Jesus our Lord.

1 Peter 1:7

that the proof of your faith -- much more precious than of gold that is perishing, and through fire being approved -- may be found to praise, and honour, and glory, in the revelation of Jesus Christ,

Treasury of Scripture Knowledge

Summary

The heaven for height, and the earth for depth, and the heart of kings is unsearchable.

Is unsearchable

General references

Bible References

Heaven

Psalm 103:11
For, as the height of the heavens is above the earth, His kindness hath been mighty over those fearing Him.
Isaiah 7:11
Ask for thee a sign from Jehovah thy God, Make deep the request, or make it high upwards.'
Isaiah 55:9
For high have the heavens been above the earth, So high have been My ways above your ways, And My thoughts above your thoughts.
Romans 8:39
nor things about to be, nor height, nor depth, nor any other created thing, shall be able to separate us from the love of god, that is in Christ Jesus our Lord.

Is unsearchable

1 Kings 4:29
And God giveth wisdom to Solomon, and understanding, very much, and breadth of heart, as the sand that is on the edge of the sea;
1 Peter 1:7
that the proof of your faith -- much more precious than of gold that is perishing, and through fire being approved -- may be found to praise, and honour, and glory, in the revelation of Jesus Christ,

General references

Isaiah 55:8
For not My thoughts are your thoughts, Nor your ways My ways, -- an affirmation of Jehovah,