Vaisvanara, the son of Danu, had four beautiful daughters, named Upadanavi, Hayasira, Puloma and Kalaka. Hiranyaksa married Upadanavi, and Kratu married Hayasira. Thereafter, at the request of Lord Brahma, Prajapati Kasyapa married Puloma and Kalaka, the other two daughters of Vaisvanara. From the wombs of these two wives of Kasyapa came sixty thousand sons, headed by Nivatakavaca, who are known as the Paulomas and the Kalakeyas. They were physically very strong and expert in fighting, and their aim was to disturb the sacrifices performed by the great sages. My dear King, when your grandfather Arjuna went to the heavenly planets, he alone killed all these demons, and thus King Indra became extremely affectionate toward him.