Matthew Poole and continuators on Psalms 102:22

22 When the people are gathered together, and the kingdoms to praise the LORD .

When the Gentiles shall gather themselves to the Jews, and join with them in the praise and worship of the true God, and of the Messias. This Verse seems to be added to intimate that although the Psalmist in this Psalm respects the deliverance of the Jews out of Babylon, yet he had a further design and a principal respect unto that greater and more general deliverance of his Church and People by the Messias.