Skandapurana 2.1.41.39

2.1.41.39

38 agastyaśaṃkhāditapastuṣṭasya bhagavata āvirbhāvaḥ brahmādiprārthanayā bhagavadgṛhītasaumyabhūta rūpaprakāraḥ, agastyaprārthanayā svarṇamukharīnadyā bhagavaddattasarvādhikatvaprāptiḥ, śaṃkhanṛpavarapradānapūrvakaṃ bhagavadantardhānam, bharadvājavarṇitaśrīveṅkaṭācalamāhātmyanirūpaṇam 50 2

38 The manifestation of the Lord, pleased with the austerity of Agastya, Śaṅkha, and others; the manner in which the Lord assumed a gentle form at the request of Brahmā and others; the river Svarṇamukharī attaining preeminence granted by the Lord at the request of Agastya; the Lord's disappearance after granting boons to King Śaṅkha; the setting forth of the Veṅkaṭācala-māhātmya described by Bharadvāja. 50 2