Isaiah 21:10
my threshing—that is, my people (the Jews) trodden down by Babylon.
corn of my floor—Hebrew, "my son of the floor," that is, my people, treated as corn laid on the floor for threshing; implying, too, that by affliction, a remnant (grain) would be separated from the ungodly (chaff) [MAURER]. HORSLEY translates, "O thou object of my unremitting prophetic pains." See Isaiah 28:27-28. Some, from Jeremiah 51:33, make Babylon the object of the threshing; but Isaiah is plainly addressing his countrymen, as the next words show, not the Babylonians.
One out of Seir asks, What of the night? Is there a hope of the dawn of deliverance? Isaiah replies, The morning is beginning to dawn (to us); but night is also coming (to you). Compare Psalms 137:7. The Hebrew captives would be delivered, and taunting Edom punished. If the Idumean wish to ask again, he may do so; if he wishes an answer of peace for his country, then let him "return (repent), come" [BARNES].
