Job 28:21

21 It is hidden from the eyes of every living thing, concealed even from the birds in the sky.

Read Job 28:21 Using Other Translations

Seeing it is hid from the eyes of all living, and kept close from the fowls of the air.
It is hidden from the eyes of all living and concealed from the birds of the air.
It is hidden from the eyes of all humanity. Even the sharp-eyed birds in the sky cannot discover it.