John Trapp on Psalms 87:4

Verſ. 4. I will make mention of Rahab and Babylon] Rahab is Egypt, and ſo called for its ſtrength, and pride. Babel the chief City of the Babylonians. Theſe were deadly enemies to Jeruſalem, which was ground betwixt them as betwixt a pair of Milſtones, but they ſhall be reckoned hereafter, ſaith God, among my domeſticks, among thoſe that know mee, or rather are known of mee. See Iſa. 19.19, 21, 25. 1 Pet. 5.13.

Behold Philiſtia] The Philiſtines were ever bitter enemies to the Iſraelites, but ſhall be converted and become children of the Church. See Iſa. 54.1. & 44.5.

And Tyre] Which ſhall leave heaping and hoarding, and imploy her Merchandiſe to feed and cloath Gods Saints. Iſa. 23.18. Act. 21.3, 4.

With Aethopia] Heb. Cuſh, of Cuſh, the ſon of Ham, their Father and founder, Gen. 10.6. Aethiopians they were called from their burnt faces. The Eunuch received the Goſpel, and publiſhed it, Act. 8. the Chriſtian faith was profeſſed among them, as 'tis thought, from the Apoſtles time; though now, for above an hundred years, they have again forſaken it.

This man was born there] Natus, id eſt renatus in illa. The men of theſe ſeveral and other Countries were born, that is, born a new, and ſo made free-deniſons of the new Jeruſalem, fellow-citizens with the Saints, and of the houſe-hold of God, Epheſ. 2.19.