Charles H. Spurgeon on Psalms 55:15

Throughout this series of Psalms, there appears to be a peculiar penalty attached to each class of transgressions, or, each variety of opposition against God meets a suitable end. The ungodly, that is, the irreligious and indifferent, lay up for themselves an evil recompense when the wrath of God shall be revealed (Ps 54:5): but an instant punishment falls upon false and treacherous professors; as Paul denounced "anathema" against any who perverted the gospel of Christ in the churches of Galatia; so in this Psalm, Let death seize upon them, and let them go down quick into hell, announces the awful judgment of Jehovah, as once it was shown upon Dathan and Abiram; a punishment that will by its suddenness and notoriety at the same time expose the guilt, and make manifest the displeasure of the Almighty against it. R. H. Ryland, in "The Psalms restored to Messiah," 1853.