Proverbs 25:3

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

1 Kings 4:29

And God gave Solomon wisdom and very great understanding and largeness of heart, even as the sand that is on the sea-shore.

Psalm 103:11

For as the heavens are high above the earth, so great is his loving-kindness toward them that fear him.

Isaiah 7:11

Ask for thee a sign from Jehovah thy God; ask for it in the deep, or in the height above.

Isaiah 55:9

For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.

Romans 8:39

nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.

1 Peter 1:7

that the proving of your faith, much more precious than of gold which perishes, though it be proved by fire, be found to praise and glory and honour 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 heavens are high above the earth, so great is his loving-kindness toward them that fear him.
Isaiah 7:11
Ask for thee a sign from Jehovah thy God; ask for it in the deep, or in the height above.
Isaiah 55:9
For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.
Romans 8:39
nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.

Is unsearchable

1 Kings 4:29
And God gave Solomon wisdom and very great understanding and largeness of heart, even as the sand that is on the sea-shore.
1 Peter 1:7
that the proving of your faith, much more precious than of gold which perishes, though it be proved by fire, be found to praise and glory and honour in the revelation of Jesus Christ:

General references

Isaiah 55:8
For my thoughts are not your thoughts, neither are your ways my ways, saith Jehovah.