Charles Ellicott Commentary Proverbs 30:31

"The greyhound; the he-goat also; And the king against whom there is no rising up." — Proverbs 30:31 (ASV)

A greyhound.— It is very doubtful what animal is meant here as being “ girt [i.e., slender] in the loins.” Several have been suggested, e.g., the horse, zebra, cock; but the rendering of the Authorised Version is as probable as any.

A king, against whom there is no rising up.— Who marches with resistless force, trampling on his conquered foes. (Compare the description of the march of the Assyrians, Isaiah 37:24 and following; compare also Isaiah 63:1 and following and Joel 2:2 and following.) It has been proposed to translate these words also as “a king with whom is [i.e., followed by] his people,” in much the same sense.