Vishnupurana 3.6.25

3.6.25

yad etat tava maitreya purāṇaṃ kathyate mayā
etad vaiṣṇavasaṃjñaṃ vai pādmasya samanantaram //

The first of all the Puráńas is entitled the Bráhma. Those who are acquainted with the Puráńas enumerate eighteen, or the Bráhma, Pádma, Vaishńava, Śaiva, Bhágavata, Náradíya, Márkańd́eya, Ágneya, Bhavishyat, Brahma Vaivartta, Lainga, Váráha, Skánda, Vámana, Kaurmma, Mátsya, Gárura, Brahmáńd́a. The creation of the world, and its successive reproductions, the genealogies of the patriarchs and kings, the periods of the Manus, and the transactions of the royal dynasties, are narrated in all these Puráńas. This Puráńa which I have repeated to you, Maitreya, is called the Vaishńava, and is next in the series to the Padma; and in every part of it, in its narratives of primary and subsidiary creation, of families, and of periods, the mighty Vishńu is declared in this Puráńa.