Albert Barnes Commentary Jeremiah 51:13

"O thou that dwellest upon many waters, abundant in treasures, thine end is come, the measure of thy covetousness." — Jeremiah 51:13 (ASV)

Upon many waters - The great wealth of Babylonia was caused not merely by the Euphrates, but by a vast system of canals, which served for defense as well as for irrigation.

The measure of your covetousness - that is, the appointed end of your gain. Some render it: the ell of your cutting off, that is, the appointed measure at which you are to be cut off, at which your web of existence is to be severed from the loom.