Psalms 125:2

Psalms 125:2. As the mountains are round about Jerusalem, so the LORD is round about his people from henceforth even for ever.

Here is security as well as stability. The mountains stand like sentinels around the central hill of Zion, so the city is well guarded, and God protects his own people against adversaries of every kind, and he will continue to do so "from henceforth even for ever."