Matsya Purana — Characteristics of Dvāpara and Kali Yugas
एते युगस्वभावा वः परिक्रान्ता यथाक्रमम् मन्वन्तराणि यान्यस्मिन् कल्पे वक्ष्यामि तानि च //
ete yugasvabhāvā vaḥ parikrāntā yathākramam manvantarāṇi yānyasmin kalpe vakṣyāmi tāni ca //
Thus the characteristics of the Yugas have been set forth to you in due order. Now I shall also describe the Manvantaras that occur in this Kalpa.
It frames cosmic history as ordered cycles: after explaining yuga-natures, the text moves to manvantaras within a kalpa—implying recurring creation-maintenance patterns across vast aeons rather than a single linear timeline.
By situating dharma within changing yugas, it implies that ethical and royal duties are taught with awareness of time-cycles; kings and householders should align conduct with śāstra that accounts for the moral conditions of each age.
No direct Vāstu or ritual rule is stated; the verse functions as a structural transition, preparing the audience for manvantara-based narrations that often ground later ritual calendars, genealogies, and tradition-lineages.