Brahmandapurana 1.23.107

Brahmāṇḍapurāṇa 1.23.107

pariyāntīśvaraśreṣṭhaṃ meḍhībhūtaṃ druvaṃ divi /
agnīndrakaśyapānāṃ tu caramo 'sau dhruvaḥ smṛtaḥ //