God is in her citadels; He has shown Himself to be a fortress.
PSALM 48 In this psalm there is celebrated some notable deliverance of the city of Jerusalem at a time when many kings had conspired to destroy it. The prophet, (whoever was the author of the psalm,) after having given thanks to God for this deliverance, takes occasion from thence to extol in magnificent terms the happy state of that city, seeing it had God for its continual guardian and protector.
Commenting on Psalm 48:1-14
God is known in her palaces for a refuge. We worship no unknown God. We know him as our refuge in distress, we delight in him as such, and run to him in every time of need. We know nothing else as our refuge.
The psalmist is designing to praise Jerusalem and to set forth the grandeur of that city; but he begins with the praises of God and his greatness (Psa 48:1), and ends with the praises of God and his goodness, Psa 48:14. For, whatever is the subject of our praises, God must be both the Alpha and Omega of them.
Commenting on Psalm 48:1-7