Ps 137:1

137:1 the waters of Babylon. The Tigris and Euphrates as well as numerous canals flowed near Babylon, far from Zion and the temple.

we sat down and wept. These words express the deep despair caused by deportation and exile.

Zion. See Ps. 2:6; 50:2; 65:1; 74:2; 128:5; 129:5.