Job 28:21 in the World English Bible
Seeing it is hidden from the eyes of all living, and kept close from the birds of the sky.
Context
20 Whence then cometh wisdom? and where is the place of understanding?
21 Seeing it is hid from the eyes of all living, and kept close from the fowls of the air.
22 Destruction and death say, We have heard the fame thereof with our ears.