Vishnupurana 3.2.46-51

At the end of every four ages there is a disappearance of the Vedas, and it is the province of the seven Rishis to come down upon earth from heaven to give them currency again. In every Krita age the Manu (of the period) is the legislator or author of the body of law, the Smriti: the deities of the different classes receive the sacrifices during the Manwantaras to which they severally belong: and the sons of the Manu them. selves, and their descendants, are the sovereigns of the earth for the whole of the same term. The Manu, the seven Rishis, the gods, the sons of the Manu, who are the kings, and Indra, are the beings who preside over the world during each Manwantara.

At the end of every four ages there is a disappearance of the Vedas, and it is the province of the seven Rishis to come down upon earth from heaven to give them currency again. In every Krita age the Manu (of the period) is the legislator or author of the body of law, the Smriti: the deities of the different classes receive the sacrifices during the Manwantaras to which they severally belong: and the sons of the Manu them. selves, and their descendants, are the sovereigns of the earth for the whole of the same term. The Manu, the seven Rishis, the gods, the sons of the Manu, who are the kings, and Indra, are the beings who preside over the world during each Manwantara.

At the end of every four ages there is a disappearance of the Vedas, and it is the province of the seven Rishis to come down upon earth from heaven to give them currency again. In every Krita age the Manu (of the period) is the legislator or author of the body of law, the Smriti: the deities of the different classes receive the sacrifices during the Manwantaras to which they severally belong: and the sons of the Manu them. selves, and their descendants, are the sovereigns of the earth for the whole of the same term. The Manu, the seven Rishis, the gods, the sons of the Manu, who are the kings, and Indra, are the beings who preside over the world during each Manwantara.

At the end of every four ages there is a disappearance of the Vedas, and it is the province of the seven Rishis to come down upon earth from heaven to give them currency again. In every Krita age the Manu (of the period) is the legislator or author of the body of law, the Smriti: the deities of the different classes receive the sacrifices during the Manwantaras to which they severally belong: and the sons of the Manu them. selves, and their descendants, are the sovereigns of the earth for the whole of the same term. The Manu, the seven Rishis, the gods, the sons of the Manu, who are the kings, and Indra, are the beings who preside over the world during each Manwantara.

An entire Kalpa, oh Brahman, is said to comprise a thousand ages, or fourteen Manwantaras; and it is succeeded by a night of similar duration; during which, he who wears the form of Brahmá, Janárddana, the substance of all things, the lord of all, and creator of all, involved in his own illusions, and having swallowed up the three spheres, sleeps upon the serpent Śesha, amidst the ocean. Being after that awake, he, who is the universal soul, again creates all things as they were before, in combination with the property of foulness (or activity): and in a portion of his essence, associated with the property of goodness, he, as the Manus, the kings, the gods, and their Indras, as well as the seven Rishis, is the preserver of the world. In what manner Vishńu, who is characterised by the attribute of providence during the four ages, effected their preservation, I will next, Maitreya, explain.

An entire Kalpa, oh Brahman, is said to comprise a thousand ages, or fourteen Manwantaras; and it is succeeded by a night of similar duration; during which, he who wears the form of Brahmá, Janárddana, the substance of all things, the lord of all, and creator of all, involved in his own illusions, and having swallowed up the three spheres, sleeps upon the serpent Śesha, amidst the ocean. Being after that awake, he, who is the universal soul, again creates all things as they were before, in combination with the property of foulness (or activity): and in a portion of his essence, associated with the property of goodness, he, as the Manus, the kings, the gods, and their Indras, as well as the seven Rishis, is the preserver of the world. In what manner Vishńu, who is characterised by the attribute of providence during the four ages, effected their preservation, I will next, Maitreya, explain.