In Indo-Iranian myth, the god of light.
He was born bearing a torch and armed with a knife, beside a sacred stream and under a sacred tree, a child of the earth itself. He soon rode, and later killed, the life-giving cosmic bull, whose blood fertilizes all vegetation. This deed became the prototype for a bull-slaying fertility ritual. As god of light, Mithra was associated with the Greek Helios and the Roman Sol Invictus. The first written reference to Mithra dates to 1400 BC. See also Mithraism .