Mahabharata Adi Parva Chapter 9:2

Mahabharata Adi Parva Chapter 9:2 "And on an auspicious day their fathers gladly married them with due rites. And the couple passed their days, devoted to each other. And Ruru having obtained such a wife, as is hard to be found, beautiful and bright as the filaments of the lotus, made a vow for the destruction of the serpent-race. And whenever he saw a serpent he became filled with great wrath and always killed it with a weapon. "One day, O Brahmana, Ruru entered an extensive forest. And there he saw an old serpent of the Dundubha species lying stretched on the ground. And Ruru thereupon lifted up in anger his staff, even like to the staff of Death, for the purpose of killing it. Then the Dundubha, addressing Ruru, said, 'I have done thee no harm, O Brahmana! Then wherefore wilt thou slay me in anger?'" So ends the ninth section of the Pauloma Parva of the Adi Parva of the blessed Mahabharata.