In the sacred tradition, it is recounted how Janārdana, assuming the form of a tortoise, once descended into the netherworld and spoke to the assembled beings there. In that divine form, he narrated the greatness of the four aims of life: dharma, artha, kāma, and mokṣa. This profound teaching, connected with the story of Indradyumna, was expounded before the sages and in the presence of Śakra, comprising eighteen thousand verses and associated with the Lakṣmī kalpa. It is said that whoever gifts the Kurma Purāṇa, accompanied by a golden tortoise at the time of the solstice, attains the merit equivalent to the gift of a thousand cows. Further, at the dawn of a new kalpa, Janārdana, now in the form of a fish, instructed Manu about the activity of the Vedas and revealed the account of Narasiṃha. This narration, detailing the stories of seven kalpas and addressed to the great sages, is known as the Matsya Purāṇa, which consists of fourteen thousand verses. Whoever, at the equinox, donates a golden fish along with a cow, is said to offer the entire earth itself. In the era of the Garuḍa Kalpa, Kṛṣṇa spoke about the wondrous birth of Garuḍa from the cosmic egg, and that sacred teaching is also preserved here. There exists an eighteen-thousand-verse section, recited together with the golden swan; whoever gives this, it is said, attains the highest accomplishment and dwells in the realm of Śiva. Brahmā, having once more spoken of the greatness of the cosmic egg, declared that the Brahmāṇḍa Purāṇa comprises twelve thousand two hundred verses. It is in this Purāṇa that the detailed accounts of future kalpas are heard, as proclaimed by Brahmā himself. Whoever donates this Purāṇa at its recitation, along with a woolen garment, receives the merit of a thousand Rājasūya sacrifices, a golden cow, and the reward of Brahmā’s own world. All these teachings, amounting to four hundred thousand verses, were composed by the wondrous sage Vyāsa and transmitted through generations—by my father, my grandfather, and myself—for the welfare of the world. Though presented here in brief by the supreme sage, among the gods, this sacred lore extends to a hundred billion verses. Now, let me describe the established subdivisions in the world. In the Padma Purāṇa, where the story of Narasiṃha is told, that Narasiṃha Purāṇa is said to have eighteen thousand verses. Where Kārttikeya describes the greatness of Nandā, that is known as the Nandī Purāṇa among the people. Similarly, wherever the narrative centers on Sāmba, that is called the Sāmba Purāṇa, as declared by the sages. The wise recognize the Purāṇas as originating from the ancient kalpas. The sequence of these Purāṇas bestows prosperity, fame, and longevity, and there, too, the name Āditya is honored. Any Purāṇa considered distinct from the eighteen should be understood, O best of the twice-born, as having arisen from these. The Purāṇas are remembered for five essential features: narrative, creation, dissolution, genealogy, the cycles of Manus, and the deeds of descendants—these are the five marks of a true Purāṇa. The greatness of Brahmā, Viṣṇu, the Sun, Rudra, and the world itself is described within them, along with teachings on dissolution and the merits of giving. Within every Purāṇa, the four aims of life—dharma, artha, kāma, and mokṣa—are mentioned, as well as the consequences opposed to them. In the Sāttvika Purāṇas, the glory of Hari is foremost; in the Rājasa Purāṇas, the greatness of Brahmā shines; in others, the greatness of Agni is told, and in the Tāmasa Purāṇas, that of Śiva. The mixed Purāṇas recount the greatness of Sarasvatī and the ancestors. Having composed the eighteen Purāṇas, Vyāsa, the son of Satyavatī, created the great narrative called Bhārata, which he expanded into one hundred thousand verses, rich with the meaning of the Vedas. The supreme tale of Rāma, as spoken by Vālmīki and declared by Brahmā, stretches in detail to a hundred crores of verses. This was gathered for Nārada, then again for Vālmīki, and by Vālmīki for the world as a means to dharma, desire, and wealth, and so these five and a quarter lakṣas are proclaimed among mortals. The wise know the Purāṇas as treasures of the ancient cycle; blessed, renowned, and life-giving is the sequence of the Purāṇas. Whoever recites or listens to them attains the highest state. These texts are pure, a treasure of fame, beloved by the ancestors, and among the gods, they are like immortality itself, forever removing the sins of men. Now, I shall fully declare the duties of charity, along with vows and fasts, as set forth in this Matsya Purāṇa. In the dialogue between the great-minded Nārada and Mahādeva, I will recount what transpired, which leads to the fulfillment of dharma, desire, and wealth. Once, Nārada, humble and free from pride, approached Hara—the destroyer of Kāma and his own limbs—as he sat upon the summit of Kailāsa. Nārada asked, “O Lord, God of gods, leader of Brahmā, Viṣṇu, and Indra, endowed with auspiciousness, health, beauty, long life, fortune, and prosperity—how does a man become a devotee of you or Viṣṇu? Or how does a woman, even if widowed but possessed of all virtues and good fortune, gradually attain liberation? O God, please declare any vow for that.” Mahādeva replied, “You have asked well, O Brāhmaṇa, for the welfare of all worlds. Listen, Nārada, to the vow that brings peace. The vow called Nakṣatrapuruṣa, of the nature of Nārāyaṇa, should be performed from the feet upwards, in due order, with the recitation of Viṣṇu’s names. One should worship the image of Vāsudeva at the beginning of the lunar mansions, entering the month of Caitra, after arranging for a Brāhmaṇa to recite. “At the nakṣatra Mūla, one should bow to Viśvadhara at the feet, and at Gulphāvananta, worship the ankles; at Rohiṇī, the shanks are to be worshipped as Varada, and at the two Jānu or at Aśvikuṃāra, the knees. At the conjunction of Pūrvā and Uttarāṣāḍhā, worship the thighs with ‘Obeisance to Śiva’; at Pūrvā and Uttarā Phalgunī, worship the loins with ‘Obeisance to Pañcaśara.’ The waist is to be worshipped with ‘Obeisance to Śārṅgadhara Viṣṇu,’ O Nārada; at Kṛttikā and the two Bhādrapadas, the sides are to be worshipped with ‘Obeisance to Keśiniṣūdana.’ The flanks, O Nārada, are to be worshipped at Revati with ‘Obeisance to Dāmodara’; and at Anurādhā, the chest with ‘Obeisance to Mādhava.’” Thus, the sacred instructions and the greatness of the Purāṇas, their structure, and the means to attain the highest ends of life were revealed, guiding all beings towards virtue, prosperity, fulfillment, and liberation.