Vishnupurana 6.6.15

6.6.15

te cocur na vayaṃ vidmaḥ kaśeruḥ pṛcchyatām iti
kaśerur api tenoktas tatheti prāha bhārgavam //

Once whilst the best of those who are skilled in devotion, Keśidhwaja, was engaged in devout exercises, a fierce tiger slew his milch cow in the lonely forest. When the Rájá heard that the cow had been killed, he asked the ministering priests what form of penance would expiate the crime. They replied that they did not know, and referred him to Kaśeru. Kaśeru, when the Rája consulted him, told him that he knew not, but that Sunaka would be able to tell him. Accordingly the Rája went to Sunaka; but he replied, "I am as unable, great king, to answer your question as Kaśeru has been; and there is no one now upon earth who can give you the information except your enemy Kháńd́ikya, whom you have conquered."