Revelation 15:8

Hailey points out three Old Testament uses of smoke in relation to God's work. (1.) Smoke was used to represent His glory. (Exodus 19:18; Habakuk 3:3) (2.) It represented God's anger being poured out in judgment. (Deuteronomy 29:20; Psalms 18:8; Psalms 74:1) (3.) Smoke was used to represent God's protective care enshrouding the faithful. When the tabernacle was finished and later when Solomon's temple was finished, God's glory filled those places so no one could enter. (Exodus 40:34-35; 1 Kings 8:10-11) This smoke may, therefore, best be thought of as God's glory filling his dwelling place so no one could enter while his wrath is being poured out in plagues upon the earth. The time for mercy is over and God is ready to punish those who have not repented.