Verses 1–6
Mahalath Mahalath, apparently a temple choir.
Maschil Maschil, "instruction."
Commentary
Psalm 53
Scofield Reference Notes (1917 edition) (1917)
The notes that made the Scofield Bible famous. They read Scripture through dispensationalism, a framework many Christians do not share: read with discernment.
Scofield Reference Notes (1917 edition) (1917). Public domain, from the CrossWire SWORD module.