Charles H. Spurgeon on Psalms 140:10

Let burning coals fall upon them, etc. The Psalmist seems here to allude to the destruction of the Sodomites. In these imprecations he considered his enemies as the enemies of God, rather than as his own; and lie thus cursed them, as knowing, in the quality of a prophet, that God himself had cursed them: and therefore these sorts of imprecations do not authorize other persons to curse their enemies. —Thomas Fenton.