Shivapurana 5.34.58

Śivapurāṇa (complete text) 5.34.58

bhārgavaḥ saptamasteṣāṃ vijñeyaḥ tapaso nidhiḥ |
pañca devagaṇāḥ proktā mānasā brahmaṇaḥ sutāḥ ||