New Defender's Study Bible Notes
87:4 Rahab. The monster Rahab was considered symbolic of Egypt.
87:6 born there. The unnamed psalmist was thankful to have been born in Jerusalem, in the “city of God” (Psalm 87:3) behind “the gates of Zion” (Psalm 87:2) on “the holy mountains” (Psalm 87:1).
87:7 all my springs. Springs, as sources of life-sustaining waters, are here compared to all the writer’s sources of joy and satisfaction, which he could find only in the place of God’s dwelling.
Psalm 88 (title) Maschil. This Maschil psalm is the only psalm attributed to Heman the Ezrahite, probably a descendant of Zerah, of the tribe of Judah (I Chronicles 2:6). The term Mahalath-Leonnoth is uncertain but possibly means something like “A Song of Lamentation.”