Brahmandapurana 2.47.99

Brahmāṇḍapurāṇa 2.47.99

ājīvāntaṃ dhariṣyāmi yatneneti mahāmatiḥ /
athānujñāpya rājānaṃ vasiṣṭho bhagavānṛṣiḥ //