Matthew Poole and continuators on Psalms 102:28

28 The children of thy servants shall continue , and their seed shall be established before thee .

Though the Heavens and the Earth perish, and though we thy servants pine away in our iniquities according to thy righteous sentence and threatning, Levit. 26. 39. and die in Captivity, yet by vertue of thy eternal and unchangeable nature and Covenant we rest assured that our Children and their Children after them shall enjoy the promised mercies, an happy restitution to, and settlement in, their own land, and the presence of our and their Messias, whom, being not to come till after 490. years, we shall not live to see. The expression here used is general, not without design, partly to shew that this promised blessing belongs to the Jews not upon the account of any carnal relation to Abraham, but as they are and continue to be Gods servants, from whom if they revolt, they lose this and all their other priviledges; and partly to imply that it belongs to all Gods faithful Servants and to their Children, whether they be Jews, or Gentiles, of whose Conversion he spoke, v. 22.

In the place of thy gracious presence, either here in thy Church, or hereafter in Heaven, from which we are now banished. And this phrase further intimates that their happiness did not consist in the enjoyment of the outward blessings of the land of Canaan, but in the presence and fruition of God there, which he mentions as the top and upshot of all his desires and their felicities.