Mbh 12.116.1a

"'Bhishma said, "In this connection is cited the following history of olden times. That history is regarded as a high precedent amongst good and wise men. That history has connection with the present topic. I heard it in the hermitage of Rama, the son of Jamadagni, recited by many foremost of Rishis. In a certain large forest uninhabited by human beings, there lived an ascetic upon fruit and roots observing rigid vows, and with his senses under control. Observant also of stringent regulations and self-restraint, of tranquil and pure soul, always attentive to Vedic recitations, and of heart cleansed by fasts, he adopted a life of goodness towards all creatures. Possessed of great intelligence, as he sat on his seat, the goodness of his behaviour having been known to all the creatures that lived in that forest, they used to approach him with affection. Fierce lions and tigers, infuriated elephants of huge size, leopards, rhinoceroses, bears, and other animals of fierce aspect, subsisting upon blood, used to come to the Rishi and address him the usual questions of polite enquiry. Indeed, all of them behaved towards him like disciples and slaves and always did unto him what was agreeable. Coming to him they addressed the usual enquiries, and then went away to their respective quarters. One domestic animal, however, lived there permanently, never leaving the Muni at any time. He was devoted to the sage and exceedingly attached to him. Weak and emaciated with fasts, he subsisted upon fruit and roots and water, and was tranquil and of inoffensive aspect. Lying at the feet of that high-souled Rishi as the latter sat, the dog, with a heart like that of a human being, became exceedingly attached to him in consequence of the affection with which he was treated. One day a leopard of great strength came there, subsisting upon blood. Of a cruel disposition and always filled with delight at the prospect of prey, the fierce animal looked like a second Yama.