Thou didst cause judgment to be heard from heavens - It seemed to come from heaven; it was manifestly from thee. The overthrow of these enemies of thy people was a manifest judgment from thee, and should be so regarded.
The earth feared - The world itself seemed to hear the voice of God, and to stand in awe.
And was still - It seemed to be profoundly attentive to what God said, and as if it reverently listened to his voice. It is not uncommon in the Scriptures to represent the earth - the hills, the mountains, the streams, the rivers, the plains - as conscious of the presence of God; as either rejoicing or trembling at his voice. Compare Psalms 65:12-13; Psalms 114:3-7; Habakkuk 3:8-11.