(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.
Main reference: Smith's Bible Dictionary (1860s)
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