Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 31
Sanskrit:
अथोदधेर्मथ्यमानात् काश्यपैरमृतार्थिभि: ।उदतिष्ठन्महाराज पुरुष: परमाद्भुत: ॥ ३१ ॥
ITRANS:
athodadher mathyamānātkāśyapair amṛtārthibhiḥudatiṣṭhan mahārājapuruṣaḥ paramādbhutaḥ
Translation:
O King, thereafter, while the sons of Kaśyapa, both demons and demigods, were engaged in churning the Ocean of Milk, a very wonderful male person appeared.