Brahmanda Purana — Anushanga Pada, Shloka 1
Kārttavīrya–Paraśurāma-saṅgrāma-kathā
Sagara’s Inquiry and Vasiṣṭha’s Account
इति श्रीब्रह्माण्डे महापुराणे वायुप्रोक्ते मध्यमभागे तृतीय उपोद्धातपादे भार्गवचरिते त्रयस्त्रिंशत्तमो ऽध्यायः सगर उवाच ब्रह्मपुत्र महाभाग महान्मे ऽनुग्रहः कृतः / यदिदं कवचं मह्यं प्रकाशितमनामयम्
iti śrībrahmāṇḍe mahāpurāṇe vāyuprokte madhyamabhāge tṛtīya upoddhātapāde bhārgavacarite trayastriṃśattamo 'dhyāyaḥ sagara uvāca brahmaputra mahābhāga mahānme 'nugrahaḥ kṛtaḥ / yadidaṃ kavacaṃ mahyaṃ prakāśitamanāmayam
Thus, in the Śrī Brahmāṇḍa Mahāpurāṇa, proclaimed by Vāyu, in the middle section, in the third introductory pāda, within the Bhārgava narrative, ends the thirty-third chapter. Sagara said: “O son of Brahmā, O greatly blessed one, you have shown me immense grace by revealing to me this Kavacha, free from affliction.”