Charles H. Spurgeon on Psalms 137:7

We are not to regard the imprecations of this Psalm in any other light than as prophetical. They are grounded on the many prophecies which had already gone forth on the subject of the destruction of Babylon, if, as we may admit, the Psalm before us was written after the desolation of Jerusalem. But these prophecies have not yet been fulfilled in every particular, and remain to be accomplished in mystic Babylon, when the dominion of Antichrist shall be for ever swept away, and the true church introduced into the glorious liberty of the sons of God, at the appearing of their Lord and Saviour Jesus Christ in his own kingdom. —William Wilson.