John Calvin Commentary Psalms 48:11

"Let mount Zion be glad, Let the daughters of Judah rejoice, Because of thy judgments." — Psalms 48:11 (ASV)

Mount Zion shall rejoice. The Psalmist now concludes his exhortation to rejoicing, telling us that Jerusalem and the other cities of Judea will have cause to commend the righteousness of God, because they had found from undoubted experience that He was the protector of their welfare. He uses the word judgment here, because God, who undertook the cause of His Church, openly showed that He was the enemy of her oppressors and that He would repress their presumption and audacity.