Matsya Purana — Genealogy from Budha to Purūravas and Yayāti; Raji’s war episode; the Paurava...
न यज्ञभागो राज्यं मे निर्जितश्च बृहस्पते राज्यलाभाय मे यत्नं विधत्स्व धिषणाधिप //
na yajñabhāgo rājyaṃ me nirjitaśca bṛhaspate rājyalābhāya me yatnaṃ vidhatsva dhiṣaṇādhipa //
“I receive neither my rightful share in the sacrifices, nor is my kingdom secure—I have been defeated. O Bṛhaspati, lord of wisdom, devise an effort by which I may regain sovereignty.”
This verse does not address pralaya; it focuses on political-religious legitimacy—Indra’s loss of sovereignty and sacrificial entitlement.
It frames kingship as tied to dharmic order: rightful rule is associated with maintaining sacrifice and receiving the sanctioned yajña-portion; when defeated, a ruler should seek wise counsel and lawful means to restore authority rather than acting impulsively.
The ritual significance is the concept of yajñabhāga (the sacrificial share), implying that participation in properly conducted yajñas underwrites cosmic and political order; no Vāstu or temple-architecture rule is mentioned in this verse.