Psalms 125:2

Round about Jerusalem. Jerusalem was uniquely situated on a mountain ridge (see on Ps. 48:2), separated from the surrounding hills by the Kidron Valley to the east, the Valley of Hinnom to the south, and the ancient city by the Tyropoeon Valley to the west. The surrounding hills were generally higher. The Mt. of Olives, for example, reaches an altitude of about 2,723 ft. at its highest point as compared with an altitude of about 2,470 ft. for the highest point of the ancient city.

Round about his people. As this girdle of mountains encircles the city, so the ever-widening circle of God’s love surrounds His people. That circle keeps them within His fold, and also keeps those who would do harm from entering in.