In the Indian epic, the _Mahabharata_, the revolving ring or wheel protects the Soma[391] (ambrosia) of the gods, on which their existence depends. The eagle giant Garuda sets forth to steal it. The gods, fully armed, gather round to protect the life-giving drink. Garuda approaches "darkening the worlds by the dust raised by the hurricane of his wings". The celestials, "overwhelmed by that dust", swoon away. Garuda afterwards assumes a fiery shape, then looks "like masses of black clouds", and in the end its body becomes golden and bright "as the rays of the sun". The Soma is protected by fire, which the bird quenches after "drinking in many rivers" with the numerous mouths it has assumed. Then Garuda finds that right above the Soma is "a wheel of steel, keen edged, and sharp as a razor, revolving incessantly. That fierce instrument, of the lustre of the blazing sun and of terrible form, was devised by the gods for cutting to pieces all robbers of the Soma." Garuda passes "through the spokes of the wheel", and has then to contend against "two great snakes of the lustre of blazing fire, of tongues bright as the lightning flash, of great energy, of mouth emitting fire, of blazing eyes". He slays the snakes.... The gods afterwards recover the stolen Soma. Garuda becomes the vehicle of the god Vishnu, who carries the discus, another fiery wheel which revolves and returns to the thrower like lightning. "And he (Vishnu) made the bird sit on the flagstaff of his car, saying: 'Even thus thou shalt stay above me'."[392] The Persian god Ahura Mazda hovers above the king in sculptured representations of that high dignitary, enclosed in a winged wheel, or disk, like Ashur, grasping a ring in one hand, the other being lifted up as if blessing those who adore him. Shamash, the Babylonian sun god; Ishtar, the goddess of heaven; and other Babylonian deities carried rings as the Egyptian gods carried the ankh, the symbol of life. Shamash was also depicted sitting on his throne in a pillar-supported pavilion, in front of which is a sun wheel. The spokes of the wheel are formed by a star symbol and threefold rippling "water rays".