New Defender's Study Bible Notes
76:2 Salem. This is the only place in the Old Testament where the name of “Jerusalem” (“the City of Peace”) is abbreviated to “Salem” (or simply “Peace”). Since this psalm is looking forward to the millennium, when God “shall speak peace” (Zechariah 9:10) to all nations, and “out of Zion shall go forth the law, and the word of the LORD from Jerusalem” (Isaiah 2:3), the city may then be known simply as Salem. It is true that Melchizedek was called “the king of Salem” in the days of Abraham (Genesis 14:18), but this was probably a theophany, not referring to an earthly city at all, but to the heavenly city (see note on Hebrews 7:2, etc.).