Jamieson, Fausset & Brown, on Jer 51:33

“For thus saith the Lord of hosts the God of Israel: The daughter of Babylon is like a thrashingfloor, this is the time of her thrashing: yet a little while, and the time of her harvest shall come.”

“like a threshing-floor, it is time to thresh her--rather, "like a threshing-floor at the time of threshing," or "at the time when it is trodden." The treading, or threshing, here put before the harvest, out of the natural order, because the prominent thought is the treading down or destruction of Babylon. In the East the treading out of the corn took place only at harvest-time. Babylon is like a threshing-floor not trodden for a long time; but the time of harvest, when her citizens shall be trodden under foot, shall come [CALVIN]. "Like a threshing-floor full of corn, so is Babylon now full of riches, but the time of harvest shall come, when all her prosperity shall be cut off" [LUDOVICUS DE DIEU]. GROTIUS distinguishes the "harvest" from the "threshing"; the former is the slaying of her citizens, the latter the pillaging and destruction of the city (compare Joe 3:13; Rev 14:15, Rev 14:18).”

Imported from an open dataset — not yet checked against the printed edition.