Text · Vaishnava · Pan-India
Vishnu Purana
Six books, about 7,000 surviving verses, a dialogue of Parashara and Maitreya, dated anywhere from 400 BCE to 900 CE; opens by declaring the universe arisen from Vishnu and carries the churning, the Prahlada story and the Nara-Narayana choice of Badrinath.
Sources: Vishnu Purana — Wikipedia; Samudra Manthana — Wikipedia; Badrinath Temple — Wikipedia · see Vishnu Purana's web