Vishnu Purana 4.8.8

4.8.8

ṣaṣṭivarṣasahasrāṇi ṣaṣṭivarṣaśatāni ca
alarkād aparo nānyo bubhuje medinīṃ yuvā //

The son of Kshatravriddha was Suhotra, who had three sons, Káśa, Leśa, and Ghritsamada. The son of the last was Śaunaka, who first established the distinctions of the four castes. The son of Káśa was Kaśirájá; his son was Dírghatamas; his son was Dhanwantari, whose nature was exempt from human infirmities, and who in every existence had been master of universal knowledge. In his past life (or when he was produced by the agitation of the milky sea), Náráyańa had conferred upon him the boon, that he should subsequently be born in the family of Kásirájá, should compose the eightfold system of medical science, and should be thereafter entitled to a share of offerings made to the gods. The son of Dhanwantari was Ketumat; his son was Bhímaratha; his son was Divodása; his son was Pratarddana, so named from destroying the race of Bhadraśreńya. He had various other appellations, as Śatrujit, 'the victor over his foes,' from having vanquished all his enemies; Vatsa, or 'child,' from his father's frequently calling him by that name; Ritadhwaja, 'he whose emblem was truth,' being a great observer of veracity; and Kuvalayáśwa, because he had a horse (aśwa) called Kuvalaya. The son of this prince was Alarka, of whom this verse is sung in the present day; "For sixty thousand and sixty hundred years no other youthful monarch except Alarka, reigned over the earth." The son of Alarka was Santati; his son was Sunítha; his son was Suketu; his son was Dharmaketu; his son was Satyaketu; his son was Vibhu; his son was Suvibhu; his son was Sukumára; his son was Dhrisht́aketu; his son was Vaińahotra; his son was Bharga; his son was Bhargabhúmi; from whom also rules for the four castes were promulgated. These are the Káśya princes, or descendants of Káśa. We will now enumerate the descendants of Raji.