Psalms 87:5 - Matthew Poole's English Annotations on the Holy Bible

Of Zion, i.e. of Jerusalem, or the church of God. It shall be said; it shall be mentioned by God, as was said, Psalms 87:4, and it shall be observed and acknowledged by men, as a great and wonderful work of God. This and that man, i.e. men of this and that nation, i.e. of every nation, indifferently, Jews or Gentiles, according to that prediction, that Egypt, and Assyria, and Israel should be all joined together, and blessed and owned by God for his people, Isaiah 19:24,25. Heb. Man and man, i.e. every man, or all sorts of men, without difference of nations; as this very phrase man and man, Leviticus 17:10,13, is rendered every or whatsoever man; and as by day and day is meant every day, or from day to day, Esther 1:1,4 Psa 61:8. And the Highest himself shall establish her: and this shall not be a sudden and transient, but a lasting work; Zion shall continue in its strength and fertility because the Almighty God is her Founder and Protector, and will finish the work which he hath begun.