Psalm 137:8 in the World English Bible
Daughter of Babylon, doomed to destruction, he will be happy who repays you, as you have done to us.
Context
7 Remember, O LORD, the children of Edom in the day of Jerusalem; who said, Rase it, rase it, even to the foundation thereof.
8 O daughter of Babylon, who art to be destroyed; happy shall he be, that rewardeth thee as thou hast served us.
9 Happy shall he be, that taketh and dasheth thy little ones against the stones.