What does Psalm 137:1 mean?
Babylon invaded Israel in 536 BC (Daniel 1:1–3), devastated Jerusalem, and carried the people into exile (2 Chronicles 36:17–21). Babylon was associated with the Euphrates river and its extensive transportation and irrigation systems. There, taken from the Promised Land (Psalm 137:4), the people are in mourning. They think of Zion, which is another name for Jerusalem (2 Samuel 5:7; 1 Kings 8:1).The early imagery of this psalm is that of defeat. The people "sit down" in grief. Upcoming verses will explain how the Babylonians mocked them (Psalm 136:3). The psalm will eventually turn to a resentful plea for revenge (Psalm 137:7–9). This song may have been written at any time during the exile, which would last for seventy years (Jeremiah 29:10–14; Ezra 2:1).