Vishnupurana 1.5.66

And the creator displayed infinite variety in the objects of sense, in the properties of living things, and in the forms of bodies: he determined in the beginning, by the authority of the Vedas, the names and forms and functions of all creatures, and of the gods; and the names and appropriate offices of the Rishis, as they also are read in the Vedas. In like manner as the products of the seasons designate in periodical revolution the return of the same season, so do the same circumstances indicate the recurrence of the same Yuga, or age; and thus, in the beginning of each Kalpa, does Brahmá repeatedly create the world, possessing the power that is derived from the will to create, and assisted by the natural and essential faculty of the object to be created.

And the creator displayed infinite variety in the objects of sense, in the properties of living things, and in the forms of bodies: he determined in the beginning, by the authority of the Vedas, the names and forms and functions of all creatures, and of the gods; and the names and appropriate offices of the Rishis, as they also are read in the Vedas. In like manner as the products of the seasons designate in periodical revolution the return of the same season, so do the same circumstances indicate the recurrence of the same Yuga, or age; and thus, in the beginning of each Kalpa, does Brahmá repeatedly create the world, possessing the power that is derived from the will to create, and assisted by the natural and essential faculty of the object to be created.