Psalms 29:8-9

As the storm moved eastward into the wilderness area near Kadesh north of Damascus, it shook the earth. It made the deer give birth to their calves prematurely and blew the leaves off the trees. Consequently, all God’s angelic host glorified Him for His great power.

It is probably significant that the phrase "voice of the Lord" occurs seven times in Psalms 29:3-9. The Israelites often regarded things done seven times as perfect acts of God, such as the creation that God accomplished in seven days.