Devibhagavatapurana 8.18.23

Devībhāgavatapurāṇa 8.18.23

sabhācatvaracaityādiśobhāḍhyāḥ suradurlabhāḥ |
nāgāsurāṇāṃ mithunaiḥ sapārāvatasārikaiḥ ||