Seraphim

mentioned in Isa. 6:2, 3, 6, 7. This word means fiery ones, in
allusion, as is supposed, to their burning love. They are
represented as "standing" above the King as he sat upon his
throne, ready at once to minister unto him. Their form appears
to have been human, with the addition of wings. (See ANGELS
T0000240.) This word, in the original, is used elsewhere only
of the "fiery serpents" (Num. 21:6, 8; Deut. 8:15; compare Isa.
14:29; 30:6) sent by God as his instruments to inflict on the
people the righteous penalty of sin.