John Gills Exposition of the Bible Commentary - Psalms 137:7
Remember, O Lord, the children of Edom in the day of Jerusalem ,.... Of her visitation, calamity, and destruction, how they behaved then, and them for it; who, though the children of Esau and brethren of the Jews, as well as their neighbours, yet hated them; the old grudge of their father, because of the birthright and blessing, as well as the old enmity of the serpent, continuing in them; and who rejoiced at their ruin, helped forward their affliction, and were assistants to the Babylonians... read more
Matthew Henry's Complete Commentary - Psalms 137:7-9
The pious Jews in Babylon, having afflicted themselves with the thoughts of the ruins of Jerusalem, here please themselves with the prospect of the ruin of her impenitent implacable enemies; but this not from a spirit of revenge, but from a holy zeal for the glory of God and the honour of his kingdom. I. The Edomites will certainly be reckoned with, and all others that were accessaries to the destruction of Jerusalem, that were aiding and abetting, that helped forward the affliction (Zech.... read more