Psalms 87:7 - Joseph Benson’s Commentary on the Old and New Testaments

As well the singers, &c., shall be there That is, in the church, and among the people of God. Indeed God's people have the greatest, nay, the only cause of rejoicing, being his children, and heirs, and joint heirs with Christ. As to all others, the divine injunction is, Be afflicted, and mourn and weep: let your laughter be turned into mourning, and your joy into heaviness. But the psalmist seems here to intimate, that when the prediction, contained in the preceding verses, should be fulfilled, and the Gentiles should be converted, and added to the church, there should be great rejoicing and praising of God, both with vocal and instrumental music, for that glorious event. He describes evangelical worship by legal phrases and customs, as the prophets frequently do. All my springs are in thee In Zion, or the church. All graces, comforts, privileges, and blessings, are to be found in thee, O church of God, and are only to be expected in and through the word preached, and the ordinances administered there. These words are thought by many commentators to be here added as the burden of the song which the forementioned singers are supposed to sing, either in their own names, or in the name of the people of God. And so the sense is, all our desires and delights are in thee, O Zion. All the springs of mercy, grace, and glory, flow to us only in and through thee.