Brahmandapurana 2.74.273

Brahmāṇḍapurāṇa 2.74.273

etai rājarṣibhiḥ sārddhaṃ śaṣṭāyāstā nibodhata /
catvāriṃśattrayaścaiva bhaviṣyāḥ saha rājabhiḥ //