Matsyapurana 53.47

53.47

yatra dharmārthakāmānāṃ mokṣasya ca rasātale
māhātmyaṃ kathayāmāsa kūrmarūpī janārdanaḥ //

15. *The Kûrma Purâṇa.*—The Purâṇa in which Viṣṇu has dwelt on the glories of the four Vargas (Dharma, Artha, Kama and Mokṣa), in the form of a Kûrma, in the Rasâtala regions, before the sages, in connection with the story of Indradyumna, where Indra was also present, through his companion Indradyumna, is known as Kûrma-Purâṇa, and is related to Lakṣmî Kalpa. It contains 18,000 ślokas.—46-47. One who gives it away in charity, along with a golden turtle, at the time of the equinox, gets the benefit of giving away thousands of cows.—48.