Matsya Purana — Genealogy from Budha to Purūravas and Yayāti; Raji’s war episode; the Paurava...
तं पुत्रो देवयानेयः पूर्वजो यदुरब्रवीत् साहाय्यं भवतः कार्यम् अस्माभिर्यौवनेन किम् //
taṃ putro devayāneyaḥ pūrvajo yadurabravīt sāhāyyaṃ bhavataḥ kāryam asmābhiryauvanena kim //
Then Yadu—the elder son born of Devayānī—said to him: “You must seek help elsewhere; what use is youth to us (to give to you)?”
Nothing directly—this verse is part of a dynastic-ethical narrative (the Yayāti–Yadu episode), not a Pralaya (cosmic dissolution) teaching.
It highlights personal agency and limits of familial obligation: Yadu refuses to surrender his youth, implying that even within kinship, one may uphold one’s own dharma and future responsibilities rather than enable another’s desire.
None is stated here; the verse concerns lineage and moral choice, not Vastu rules, temple iconography, or ritual procedure.