Psalms 87:1

Darby⁽ⁱ⁾ ¹ {Of the sons of Korah. A Psalm. A Song.} His foundation is in the mountains of holiness.

Online Parallel Study Bible

Psalms 87:1 The nature and glory of the church.
Psalms 87:4 The increase, honour, and comfort of the members thereof.

A.M. 3468. B.C. 536. (Title.) A Psalm.It is highly probable that this Psalm was written by one of the descendants of Korah on the return from the Bablonian captivity. It seems to have been written in praise of Jerusalem; and, typically, of the Christian church.
for. or, of.
His.
2 Chronicles 3:1; Isaiah 28:16; Matthew 16:18; 1 Corinthians 3:10; 1 Corinthians 3:11; Ephesians 2:20-22; 1 Peter 2:4-8
the holy.
Psalms 48:1; Psalms 48:2; Psalms 68:16; Psalms 121:1; Isaiah 2:2; Isaiah 2:3; Isaiah 56:7; Zechariah 8:3; 2 Peter 1:18