Matsya Purana — Account of the Manvantaras: Manus
अतीतानागताश्चैते मनवः परिकीर्तिताः षडूनं युगसाहस्रम् एभिर् व्याप्तं नराधिप //
atītānāgatāścaite manavaḥ parikīrtitāḥ ṣaḍūnaṃ yugasāhasram ebhir vyāptaṃ narādhipa //
Thus these Manus—both those who have passed and those yet to come—have been recounted. O king, by them a span of a thousand yuga-cycles, lacking six, is pervaded (that is, fully accounted for).
It situates cosmic history in measurable cycles (yugas and Manus), implying that creation and dissolution are periodic and structured rather than random.
By addressing the listener as “narādhipa” (king), it frames rulership within cosmic order—kingship is to be exercised with awareness of time-cycles and dharmic continuity across generations.
No direct vastu or ritual rule is stated; the verse is primarily chronological, providing the time-framework that later supports calendrical and ritual timing in Purāṇic practice.