51:1-58 The particulars of this prophecy are dispersed and interwoven, and the same things left and returned to again. Babylon is abundant in treasures, yet neither her waters nor her wealth shall secure her. Destruction comes when they did not think of it. Wherever we are, in the greatest depths, at the greatest distances, we are to remember the Lord our God; and in the times of the greatest fears and hopes, it is most needful to remember the Lord. The feeling excited by Babylon's fall is the same with the New Testament Babylon, Re 18:9,19. The ruin of all who support idolatry, infidelity, and superstition, is needful for the revival of true godliness; and the threatening prophecies of Scripture yield comfort in this view. The great seat of antichristian tyranny, idolatry, and superstition, the persecutor of true Christians, is as certainly doomed to destruction as ancient Babylon. Then will vast multitudes mourn for sin, and seek the Lord. Then will the lost sheep of the house of Israel be brought back to the fold of the good Shepherd, and stray no more. And the exact fulfilment of these ancient prophecies encourages us to faith in all the promises and prophecies of the sacred Scriptures.
33. 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; Re 14:15, 18).