John Trapp on Psalms 87:6-7

Verſ. 6. The Lord ſhall count when he writeth up the people.] When he maketh his Cenſe-book (called the writing of the houſe of Iſrael, Ezek. 13.9. the Lords book of remembrance, Mal. 3.16. the Regiſter of the living in Jeruſalem. Iſa. 4.3.) he ſhall muſter them in the roll of his ſouldiers, number them in the catalogue of his Citizens, call them in the nomenclatura of his Diſciples, &c. A glorious priviledge ſurely.

As well the ſingers as the players, &c.] There ſhall be an exuberancy of joy in the holy Ghoſt, the only comfortable ſoul-raviſhing muſick, far beyond that of the materiall Temple.

All my ſprings are in thee] i. e. All my thoughts run upon thee, with greateſt; delight; My eyes are wholly fixt upon thee, Calvin. R. Solomon. ſo ſome read it: Others, My bowels are in thee, making theſe to be the words of the Pſalmiſt. But methinks they do better that make them to be the words of God, promiſing plenty of grace and comfort to his people, as from ever-flowing over-flowing fountains.