The closing verses of Psalm 137 are fairly infamous.
I mean, it starts so somber…
1 By the rivers of Babylon we sat and wept
when we remembered Zion.
And then it’s all like, you know what we need? A genocide!
8 Daughter Babylon, doomed to destruction,
happy is the one who repays you
according to what you have done to us.
9 Happy is the one who seizes your infants
and dashes them against the rocks.