A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown [1882] at sacred-texts.com
Psalms Chapter 122
This Psalm might well express the sacred joy of the pilgrims on entering the holy city, where praise, as the religious as well as civil metropolis, is celebrated, and for whose prosperity, as representing the Church, prayer is offered. (Psa 122:1-9)
Our feet shall stand--literally, "are standing."
gates--(Compare Psa 9:14; Psa 87:2).
compact together--all parts united, as in David's time.
testimony--If "unto" is supplied, this may denote the ark (Exo 25:10-21); otherwise the act of going is denoted, called a testimony in allusion to the requisition (Deu 16:16), with which it was a compliance.
there are set thrones--or, "do sit, thrones," used for the occupants, David's sons (Sa2 8:18).
Let peace--including prosperity, everywhere prevail.
In the welfare of the city, as its civil, and especially the religious relations, was involved that of Israel.
now--as in Psa 115:2.
Let me say--house of . . . God--in wider sense, the Church, whose welfare would be promoted by the good of Jerusalem.