Matsyapurana 7.3

7.3

syamantapañcake kṣetre sarasvatyāstaṭe śubhe
bhartur ārādhanaparā tapa ugraṃ cacāra ha //

Sûta said:--In the days gone by, when Lord Viṣṇu destroyed the offspring of Diti in the great war between the Devas and Asuras, Diti repaired to Syamantapañchaka—a holy place—on the banks of the Sarasvatî, and devoted herself to the worship of her husband and practised severe penances for a considerable length of time.—2-3.