迦留陀夷 (Skt; Jpn Karudai)
A disciple of Shakyamuni Buddha. When Shakyamuni was a prince, Kalodayin was his subject. Later Kalodayin renounced secular life and became a disciple of the Buddha. He is said to have failed to observe the precepts, but later attained the state of arhat and converted 999 families in Shravasti.
According to The Ten Divisions of Monastic Rules, Kalodayin was killed and his head buried in horse dung by the jealous husband of a woman who gave him offerings when he was begging for alms in Shravasti. According to another account, Kalodayin happened to discover a young Brahman woman's love affair. Fearing he would tell her husband, she feigned sickness and asked him, as a Buddhist monk, to come to care for her.
When he arrived, she had her servant behead him.
Kalodayin means “black light.” His skin was black but his body glowed, and his eyes emitted light. One night as he was out . bu dong li ken walking, a pregnant woman was so startled to see his two bright eyes and black-lit body that she had a miscarriage and died. Because of this the Buddha set up a precept forbidding Shramanas to take walks at night.
Black Light served the Buddha as an attendant and a Dharma Protector. He was the foremost teacher who taught and transformed the greatest number of people, creating over one thousand certified sages.