(Isa. 13:9)
Rashi says that means their faces (i.e., of the Babylonians) will be yellow with fear. Kimshi says, red with shame. And Ibn Ezra, stressing the root of the word which means “fire” or “flame,” says that it means the face burned with intense pain.
(Solomon B. Freehof, Book of Isaiah [New York: Union of American Hebrew Congregation, 1972), 84.)