Let my tongue stick to the roof of my mouth, if I do not remember you, if I do not set Jerusalem above my highest joy!
Babylon means the kingdom, not the city. The Jews gathered by the rivers where they could worship in the open air, since they had no synagogues there. This is history written as it happened, not prophecy: the captivity has come, and the Psalmist speaks for the whole Church under this affliction.
AI summary
Commenting on Psalm 137:1-9
If I do not remember thee, let my tongue cleave to the roof of my mouth. Thus the singers imprecate eternal silence upon their mouths if they forget Jerusalem to gratify Babylon. The players on instruments and the sweet songsters are of one mind: the enemies of the Lord will get no mirthful tune or song from them. If I prefer not Jerusalem above my chief joy.
Zion sits covered in cloud, dwelling among Babylon's daughters, tears mixing with the streams. They were posted by the rivers as prisoners of war, quartered there to labor in the galleys or left in solitude to match their sorrow. When they remembered Zion's glory, their love for God's house swallowed up every other care.
AI summary
Commenting on Psalm 137:1-6