Psalm 137 is a hymn expressing the longing of the Jewish people during their Babylonian exile. The psalm reflects the yearning for Jerusalem as well as hatred for the Holy City’s enemies with sometimes violent figures of speech. It is one of several psalms called imprecatory psalms, in which the author turns to God to bring down judgment or punishment on his enemies.

It reads in Psalm 137:1-9 NIV
By the rivers of Babylon we sat and wept when we remembered Zion. There on the poplars we hung our harps, for there our captors asked us for songs, our tormentors demanded songs of joy; they said, “Sing us one of the songs of Zion!” How can we sing the songs of the Lord while in a foreign land? If I forget you, Jerusalem, may my right hand forget its skill. May my tongue cling to the roof of my mouth if I do not remember you if I do not consider Jerusalem my highest joy. Remember, Lord, what the Edomites did on the day Jerusalem fell.“Tear it down,” they cried, “tear it down to its foundations!” Daughter Babylon, doomed to destruction, happy is the one who repays you according to what you have done to us. Happy is the one who seizes your infants and dashes them against the rocks.