Shivapurana 7.1.25.18

Śivapurāṇa (complete text) 7.1.25.18

tapaśca vavṛdhe devyāstīvraṃ tīvratarātmakam |
devāśca daityanirbandhād brahmāṇaṃ śaraṇaṃ gatāḥ ||