Jeremiah 51:33

Translate, “The daughter of Babylon is as a threshing-floor at the time when it is trampled,” i. e., trodden hard in readiness for the threshing: “yet a little while and the harvest-time” shall come to her, i. e., overtake her. In the East, the grain when reaped is carried at once to the threshing-floor, a level spot carefully prepared beforehand, usually about 50 feet in diameter, and trampled hard. The grain after it has been beaten out by a sledge drawn over it by oxen is separated from the chaff and stored up in granaries.