Harivamsha 13.24

13.24

lokāḥ somapadā nāma marīcer yatra vai sutāḥ
pitaro divi vartante devās tān bhāvayanty uta
agniṣvāttā iti khyātāḥ sarva evāmitaujasaḥ //

There are realms named Somapadā where the sons of Marīci,
the ancestors, dwell in heaven, and the gods revere them;
they are all known as Agniṣvāttas, of boundless power.