OK, not missing, but rarely, if ever, read out in church.
Psalm 137 is the one all Boney M fans know, starting "By the rivers of Bablyon we sat and wept when we remembered Zion."
The last two verses are (in my NIV Bible)

Psalm 137 is the one all Boney M fans know, starting "By the rivers of Bablyon we sat and wept when we remembered Zion."
The last two verses are (in my NIV Bible)
So, God thinks it's not only OK but actually a good thing to take the children of those who have wronged you and dash them against the rocks. Can't think why it mentioned more often - come back radical Islam, all is forgiven.O Daughter of Babylon, doomed to destruction, happy is he who repays you for what you have done - he who seizes your infants and dashes them against the rocks