Charles Ellicott Commentary Job 39:13

"The wings of the ostrich wave proudly; [But] are they the pinions and plumage of love?" — Job 39:13 (ASV)

Gavest thou the goodly wings unto the peacocks? —Rather, The wing of the ostrich is superb, but are her pinions and her feathers like the stork’s? Ostrich feathers are said to be worth from £8 to £15 a pound; but, beautiful and valuable as they are, they are hardly like the plumage of a bird, and are not so used for flight; on the contrary, the ostrich runs like a quadruped, it is stated at the rate sometimes of fifty or sixty miles an hour.