It is hidden from the eyes of every living thing and concealed from the birds of the air.
The question which Job had asked (Job 28:12) he asks again here; for it is too worthy, too weighty, to be let fall, until we speed in the enquiry. Concerning this we must seek till we find, till we get some satisfactory account of it.
Commenting on Job 28:20-28
Destruction and death say,.... Meaning the dead that are in the pit of destruction, the grave; not their dead bodies there, devoid of life and sense, and know not anything, but their souls; either the damned in hell, or the saints in heaven: the Targum is, the house of destruction, and the angel of death; or rather it regards such as are dead, who while...
None can tell whence or where, seeing it, &c. fowls--The gift of divination was assigned by the heathen especially to birds. Their rapid flight heavenwards and keen sight originated the superstition. Job may allude to it. Not even the boasted divination of birds has an insight into it (Ecc 10:20). But it may merely mean, as in Job 28:7, It escapes the eye of the most keen-sighted bird.