Then God appeared on my behalf in a miraculous and glorious manner, and with the great terror and confusion of all mine enemies, which is here compared to an earthquake. The earthquake was so deep and violent, that it overthrew whole mountains by the roots; whereby he designs his lofty and potent enemies; such being oft compared to mountains, as Psalms 46:2,3 Psalms 144:5 Isaiah 41:15, &c.
Related Commentaries of Psalms 18:7
Psalms 18:7
7 Then the earth shook and trembled; the foundations also of the hills moved and were shaken, because he was wroth.