Seraphim

 
It differs from the cherubim in having six wings instead of four (Isa. 6:22Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly. (Isaiah 6:2)), and in being instruments of mercy instead of judgment, like the cherubim. The four beasts in the Revelation combine the two. See CHERUBIM, FOUR BEASTS.