Brahmandapurana 2.63.135

Brahmāṇḍapurāṇa 2.63.135

te hanyamānā vīreṇa sagareṇa mahātmanā /
vasiṣṭhaṃ śaraṇaṃ sarve saṃprāptāḥ śaraṇaiṣiṇaḥ //