Revelation 15-16

All through the revelation John heard creature and people speak of God's greatness and power. In 16:7 John heard the altar of God's temple speaking of the rightness of God's judgments. Much like the stones' shouting that Jesus mentioned in Luke 19:40 this part of the vision displays the witness of God offered by every aspect of creation.
It took me about 5 minutes to read this passage.
Stuart