Mahabharat Section-10

Sauti said: “And Ruru on hearing those words replied, ‘My wife,
dear to me as life, was bit by a snake ; upon which, I took, O snake,
dreadful vow, viz., that I would kill every snake that I might come
across. Therefore shall I smite thee and thou shalt be deprived of life.” “And the Dundubha replied, ‘O Brahmana, the snakes that bite man
are quite different in type. It behoveth thee not to slay Dundubhas
who are serpents only in name. Subject like other serpents to the same
calamities but not sharing their good fortune, in woe the same but in joy different, the Dundubhas should not be slain by thee under any misconception.’ ‘ Sauti continued : “And the Rishi Ruru hearing these words of the serpent, and seeing that it was bewildered with fear albeit a snake of the Dundubha species, killed it not. And Ruru, the possessor of the six attributes, comforting the snake addressed it, saying, ‘Tell me fully, O
snake, who art thou thus metamorphosed ?* And the Dundubha replied,
O Ruru ! I was formerly a Rishi of name Sahasrapat. And it is by the curse of a Brahmana that I have been transformed into a snake.’ And
Ruru asked, *O thou best of Snakes, for what wast thou cursed by a Brahmana in wrath ? And how long also shall thy form continue so ?” And so ends the tenth section of the Pauloma Parva of the Adi
Parva.