Vishnupurana 4.2.14

4.2.14

śaśādasya puraṃjayo nāma putro 'bhavat ||

Upon one of the days called Asht́aka, Ikshwáku being desirous of celebrating ancestral obsequies, ordered Vikukshi to bring him flesh suitable for the offering. The prince accordingly went into the forest, and killed many deer, and other wild animals, for the celebration. Being weary with the chase, and being hungered, he sat down, and ate a hare; after which, being refreshed, he carried the rest of the game to his father. Vaśisht́ha, the family priest of the house of Ikshwáku, was summoned to consecrate the food; but he declared that it was impure, in consequence of Vikukshi's having eaten a hare from amongst it (making it thus, as it were, the residue of his meal). Vikukshi was in consequence abandoned by his offended father, and the epithet Śaśáda (hare-eater) was affixed to him by the Guru. On the death of Ikshwáku, the dominion of the earth descended to Śaśáda, who was succeeded by his son Puranjaya.