Gregory the Dialogist

The pathway of the bird it knew not, nor beheld the eyes of the vulture. Therefore, what it was since we have heard, even that her stones are the place of sapphires, now let us hear next wherefore that People so beloved of God lost these great blessings. Who is denoted in this place by the title of 'the bird,' saving He, Who in ascending poised skywards the fleshly body, which He took to Him. Who furthermore is fitly designated by the title of the 'vulture' as well. …

Morals on the Book of Job, Book XVIII ↗

Thomas Aquinas

Because these places release a harmful air from the abundance of sulphur, not only men, but also brute animals avoid these places. First as to the birds concerning which there is less reflection he says, "Land," that kind of earth, "does not know the path of the bird," namely, it does not dare to fly over it, nor even to approach it, because of the harmful air. Thus he says, "nor has looked on," it, "the eye of the vulture," who can normally see things from far away. Or one can interpret the text in another way. …

Commentary on Job ↗