Psalms 125:2 - Ellicott's Commentary On The Whole Bible

As the mountains. — In the first verse, the stability of the faithful is compared to that of Mount Zion; here their security to that of the city girt by its hills. (On the geographical reference, see Dean Stanley, S. and P., pp. 174, 175.) Robinson’s description is — “The sacred city lies upon the broad and high mountain range, which is shut in by the two valleys, Jehoshaphat and Hinnom. All the surrounding hills are higher: in the east, the Mount of Olives; on the south, the so-called Hill of Evil Counsel, which ascends from the valley of Hinnom; on the west, the ground rises gently to the border of the great wadi, as described above; while on the north the bend of a ridge which adjoins the Mount of Olives limits the view to the distance of about a mile and a half.” In Zechariah 2:4-5, the protecting care of Jehovah is likened to a wall round the city, instead of to the rampart of mountains, as here.