Matsyapurana 47.32

47.32

bhaviṣyāḥ kati caivānye prādurbhāvā mahātmanaḥ
brahmakṣatreṣu śānteṣu kimarthamiha jāyate //

The Ṛiṣis said—Sûta! How did Viṣṇu, the prime cause of the universe, come to be born on this earth, along with the seven Ṛiṣis, Kuvera, Yakṣa, the sages Mâṇichara, Sâlaki and Nârada, Siddha, Dhanvantari? How many manifestations have there been of Viṣṇu, and how many of them will be in future? Why does the Lord Viṣṇu incarnate Himself exclusively among the tranquil Brâhmaṇs, and the Kṣatryâs? O Sûta! pray tell us the object of Viṣṇu's incarnating Himself in the family of Vṛiṣṇi, Andhaka, &c., and also the cause of manifesting Himself again and again in human form.—30-33.