Job 28:7

No bird has knowledge of it, and the hawk's eye has never seen it.

Job 11:6

And would make clear to you the secrets of wisdom, and the wonders of his purpose!

Job 28:21-23

For it is kept secret from the eyes of all living, unseen by the birds of the air.

Job 38:19

Which is the way to the resting-place of the light, and where is the store-house of the dark;

Job 38:24

Which is the way to the place where the wind is measured out, and the east wind sent out over the earth?

Romans 11:33

O how deep is the wealth of the wisdom and knowledge of God! no one is able to make discovery of his decisions, and his ways may not be searched out.

Treasury of Scripture Knowledge

Summary

There is a path which no fowl knoweth, and which the vulture's eye hath not seen:

Bible References

A path

Job 28:21
For it is kept secret from the eyes of all living, unseen by the birds of the air.
Job 11:6
And would make clear to you the secrets of wisdom, and the wonders of his purpose!
Job 38:19
Which is the way to the resting-place of the light, and where is the store-house of the dark;
Romans 11:33
O how deep is the wealth of the wisdom and knowledge of God! no one is able to make discovery of his decisions, and his ways may not be searched out.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain