O thou that dwellest upon many {i} waters, abundant in treasures, thy end is come, and the measure of thy covetousness.

(i) For the land of Chaldea was full of rivers which ran into the Euphrates.

Wesley's Notes

51:13 Waters - Babylon is said to dwell upon many waters, because the great river Euphrates, did not only run by it, but almost encompass it branching itself into many smaller rivers, which made several parts of the city, islands.

Jamieson-Fausset-Brown Bible Commentary

13. waters-(Jer 51:32, 36; see on [1002]Isa 21:1). The Euphrates surrounded the city and, being divided into many channels, formed islands. Compare as to spiritual Babylon "waters," that is, "many peoples," Re 17:1, 15. A large lake also was near Babylon.

measure-literally, "cubit," which was the most common measure, and therefore is used for a measure in general. The time for putting a limit to thy covetousness [Gesenius]. There is no "and" in the Hebrew: translate, "thine end, the retribution for thy covetousness" [Grotius]. Maurer takes the image to be from weaving: "the cubit where thou art to be cut off"; for the web is cut off, when the required number of cubits is completed (Isa 38:12).

Matthew Henry's Concise Commentary

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.