Bible Commentary
Psalm 53
Psalm 53 is another maskil of David. "To Mahalath" in the superscription, which may be part of a postscript to Psalm 52 (and also found in the superscription of Psalm 88 as part of a longer phrase), could represent the psalm being set to the tune of another song. Yet it might mean something else. The words have been variously interpreted as "On sickness," "On suffering," "To pipings" (on wind instruments) or "To dances" (or some sort of choreography).
Psalm 53 repeats much of Psalm 14 with some minor variation (see the Beyond Today Bible Commentary on Psalm 14). The placement of nearly the same psalm here provides a further commentary on the sort of arrogant godless fool described in Psalms 49 and 52—and thus brings the cluster of psalms beginning with 49 to a close. It also helps to demonstrate that originally the various books of the Psalter were probably separate collections or hymnals.
One noticeable difference between the two psalms is that here the word Elohim ("God") is used throughout rather than Yhwh (the Eternal or "LORD").
The other significant difference occurs in verse 5. As the Zondervan NIV Study Bible notes on this verse, it "differs considerably from Psalm 14:5-6, though the basic thought remains the same: God overwhelms the godless who attack his people. Here the verbs are in the past tense (perhaps to express the certainty of their downfall)." As to God scattering the bones of the enemy, it means "over the battlefield of their defeat, their bodies left unburied like something loathsome (see Isaiah 14:18-20; Jeremiah 8:2...)" (same note). However, it could also be that so many will be destroyed at the end that they will not be able to be buried for some time, such as when the godless army of Gog is destroyed (see Ezekiel 39:11-16).
The closing verse of Psalm 14 and of 53 are identical in expressing a great yearning for salvation, rejoicing and gladness when God restores His people to their land. This speaks prophetically of the future establishment of the Kingdom of God on earth.