At the request of Lord Brahma, Prajapati Kasyapa married Puloma & 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 & the Kalakeyas

Expressions researched:
"Thereafter, at the request of Lord Brahmā, Prajāpati Kaśyapa married Pulomā and Kālakā, the other two daughters of Vaiśvānara. From the wombs of these two wives of Kaśyapa came sixty thousand sons, headed by Nivātakavaca, who are known as the Paulomas and the Kālakeyas"

Srimad-Bhagavatam

SB Canto 6

Thereafter, at the request of Lord Brahmā, Prajāpati Kaśyapa married Pulomā and Kālakā, the other two daughters of Vaiśvānara. From the wombs of these two wives of Kaśyapa came sixty thousand sons, headed by Nivātakavaca, who are known as the Paulomas and the Kālakeyas.

SB 6.6.33-36, Translation

Vaiśvānara, the son of Danu, had four beautiful daughters, named Upadānavī, Hayaśirā, Pulomā and Kālakā. Hiraṇyākṣa married Upadānavī, and Kratu married Hayaśirā. Thereafter, at the request of Lord Brahmā, Prajāpati Kaśyapa married Pulomā and Kālakā, the other two daughters of Vaiśvānara. From the wombs of these two wives of Kaśyapa came sixty thousand sons, headed by Nivātakavaca, who are known as the Paulomas and the Kālakeyas. 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.