Charles Ellicott Commentary Isaiah 21:10

"O thou my threshing, and the grain of my floor! that which I have heard from Jehovah of hosts, the God of Israel, have I declared unto you." — Isaiah 21:10 (ASV)

O my threshing, and the corn of my floor.—Literally, and child of my threshing-floor... The words are abrupt, and we have to read the thoughts that lie below them. The “child of the threshing-floor” is none other than Israel, thought of as the corn which is under God’s chastisements, Assyrian and Chaldean invasions, Babylonian exile, and the like, severing the wheat from the chaff (Micah 4:12–13; Jeremiah 51:33; Matthew 3:3). The prophet looks on those chastisements with yearning pity, but he cannot go beyond the word of the Lord (Numbers 24:13), and this is all that he has to tell his people. The oppressor shall in the end be overthrown, but that which lies between the present and that far-off future is, as yet, concealed from him.