Jeremiah 51:42

The sea is come up upon Babylon
A vast army, comparable to the great sea for the multitude thereof, even the army of the Medes and Persians under Cyrus; so the Targum,

``a king with his armies, which are numerous like the waters of the sea, is come up against Babylon:''

she is covered with the multitude of the waves thereof;
being surrounded, besieged, surprised, and seized upon by the multitude of soldiers in that army, which poured in upon it unawares. Some think here is a beautiful antithesis, between the inundation of Cyrus's army and the draining of the river Euphrates, by which means he poured in his forces into Babylon.