Job 28:21

It is hidden from [the] eyes of all living, and it is concealed from [the] birds of the heaven.

Psalm 49:3-4

My mouth will speak wisdom, and the meditation of my heart [will be] understanding.

Matthew 11:25

At that time Jesus answered [and] said, "I praise you, Father, Lord of heaven and earth, because you have hidden these [things] from the wise and intelligent, and have revealed them to young children.

Matthew 13:17

For truly I say to you that many prophets and righteous [people] longed to see what you see, and did not see [it], and to hear what you hear, and did not hear [it]!

Matthew 13:35

in order that what was spoken through the prophet would be fulfilled, who said, "I will open my mouth in parables; I will proclaim what has been hidden since the creation."

1 Corinthians 2:7-10

but we speak the hidden wisdom of God in a mystery, which God predestined before the ages for our glory,

Colossians 2:3

in whom all the treasures of wisdom and knowledge are hidden.

Treasury of Scripture Knowledge

Summary

Seeing it is hid from the eyes of all living, and kept close from the fowls of the air.

From the fowls

Bible References

Hid

Psalm 49:3
My mouth will speak wisdom, and the meditation of my heart [will be] understanding.
Matthew 11:25
At that time Jesus answered [and] said, "I praise you, Father, Lord of heaven and earth, because you have hidden these [things] from the wise and intelligent, and have revealed them to young children.
Matthew 13:17
For truly I say to you that many prophets and righteous [people] longed to see what you see, and did not see [it], and to hear what you hear, and did not hear [it]!
1 Corinthians 2:7
but we speak the hidden wisdom of God in a mystery, which God predestined before the ages for our glory,
Colossians 2:3
in whom all the treasures of wisdom and knowledge are hidden.

From the fowls

Job 28:7
"[It is] a path a bird of prey does not know and [the] black kite's eye has not seen.