Charles H. Spurgeon on Psalms 87:4

I will make mention of Rahab and Babylon to them that know me. This shall be a glorious subject to speak of concerning Zion, that her old foes are new born and have become her friends, worshipping in the temple of her God. Rahab or Egypt which oppressed Israel shall become a sister nation, and Babylon in which the tribes endured their second great captivity, shall become a fellow worshipper; then shall there be mention made in familiar talk of the old enmities forgotten and the new friendships formed. Some consider that these are the words of God himself, and should be rendered "I will mention Rahab and Babylon as knowing me": but we feel content with our common version, and attribute the words to the Psalmist himself, who anticipates the conversion of the two great rival nations and speaks of it with exultation. Behold Philistia, and Tyre, with Ethiopia. These also are to bow before the Lord. Philistia shall renounce her ancient hate, Tyre shall not be swallowed up by thoughts of her commerce, and distant Ethiopia shall not be too far off to receive the salvation of the Lord. This man was born there. The word man is inserted by the translators to the marring of the sense, which is clear enough when the superfluous word is dropped, —"Philistia, and Tyre, with Ethiopia; this was born there" —i.e., this nation has been born into Zion, regenerated into the church of God. Of the new births of nations we will make mention, for it is at once a great blessing and a great wonder. It is a glorious thing indeed when whole nations are born unto God.

"Mark ye well Philistia's legions,

Lo, to seek the Lord they came;

And within the sacred regions

Tyre and Cush have found a home."

Many understand the sense of these verses to be that all men are proud of their native country, and so also is the citizen of Zion, so that while of one it is said, "he was born in Egypt" and of another, "he came from Ethiopia", it would be equally to the honour of others that they were home born sons of the city of God. The passage is not so clear that any one should become dogmatical as to its meaning, but we prefer the interpretation given above.