Jeremiah 51:33

For thus saith the Lord of hosts, the God of Israel, The daughter of Babylon is like a threshing-floor, the whole empire being included in this figure; it is time to thresh her, by the customary treading or stamping by means of which the kernels of grain were separated from their hulls; yet a little while, and the time of her harvest shall come, when she would be trodden under foot. The inhabitants of Israel and Judah are now introduced with a lament showing the reason for the Lord's punishment upon Babylon.