Psalms 137:7

What we love, we love to think of. Those that rejoice in God, for his sake make Jerusalem their joy. They stedfastly resolved to keep up this affection. When suffering, we should recollect with godly sorrow our forfeited mercies, and our sins by which we lost them. If temporal advantages ever render a profession, the worst calamity has befallen him. Far be it from us to avenge ourselves; we will leave it to Him who has said, Vengeance is mine. Those that are glad at calamities, especially at the calamities of Jerusalem, shall not go unpunished. We cannot pray for promised success to the church of God without looking to, though we do not utter a prayer for, the ruin of her enemies. But let us call to mind to whose grace and finished salvation alone it is, that we have any hopes of being brought home to the heavenly Jerusalem.

Remember, O LORD, the children of Edom in the day of Jerusalem. The case is left in Jehovah's hands. He is a God of recompenses, and will deal out justice with impartiality. The Edomites ought to have been friendly with the Israelites, from kinship; but there was a deep hatred and cruel spite displayed by them. The elder loved not to serve the younger, and so when Jacob's day of tribulation came, Esau was ready to take advantage of it. The captive Israelites being moved by grief to lodge their complaints with God, also added a prayer for his visitation of the nation which meanly sided with their enemies, and even Urged the invaders to more than their usual cruelty. Who said, Rase it, rase it, even to the foundation thereof. They wished to see the last of Jerusalem and the Jewish state; they would have no stone left standing, they desired to see a clean sweep of temple, palace, wall, and habitation. It is horrible for neighbours to be enemies, worse for them to show their enmity in times of great affliction, worst of all for neighbours to egg others on to malicious deeds. Those are responsible for other men's sins who would use them as the tools of their own enmity. It is a shame for men to incite the wicked to deeds which they are not able to perform themselves. The Chaldeans were ferocious enough without being excited to greater fury; but Edom's hate was insatiable. Those deserve to be remembered by vengeance who in evil times do not remember mercy; how much more those who take advantage of calamities to wreak revenge upon sufferers. When Jerusalem's day of restoration comes Edom will be remembered and wiped out of existence.