Seraphim

(burning, glowing), an order of celestial beings, whom Isaiah beheld in vision standing above Jehovah as he sat upon his throne, and you can find more about that here on st-takla.org on other commentaries and dictionary entries. (Isaiah 6:2) They are described as having each of them three pairs of wings, with one of which they covered their faces (a token of humility); with the second they covered their feet (a token of respect); while with the third they flew. They seem to have borne a general resemblance to the human figure. ver. 6. Their occupation was two fold to celebrate the praises of Jehovah's holiness and power, ver. 3 and to act as the medium of communication between heaven and earth. ver. 6.

* See also: Cherubim.