Bhagavatapurana 4.15.19

4.15.19

nāṭyaṃ sugītaṃ vāditram antardhānaṃ ca khecarāḥ /
ṛṣayaś cāśiṣaḥ satyāḥ samudraḥ śaṅkham ātmajam //

19. Those that move about in the sky *i.e.*, the Ghandarvas, Charanas and others taught him the arts of dancing, music and playing upon instruments as well as the power of remaining incognito (invisible); the Rishis uttered their real benedictions; and Samudra (the ocean) presented him a Sankha born of him.