Vishnupurana 4.4.p1

4.4.p1

Parāçara said:—Sagara had two wives Sumati, the daughter of Kasyapa and Kesini, the daughter of king Viderbha. Having no offspring the king earnestly solicited the help of the sage Aurva who conferred upon him a boon that one wife should bear him a son who would keep up the race and the other sixty thousand sons; but he allowed them to make their election. Kesini chose to have one son and the other chose to have sixty thousand. Within a few days Kesini gave birth to a son named Asamanjas who upheld the family and Sumati the daughter of Vinata gave birth to a sixty thousand sons. Asamanjas had a son whose name was Ansumat.