Matsya Purana — Account of the Manvantaras: Manus
ज्योतिष्मान् द्युतिमान् हव्यो मेधा मेधातिथिर् वसुः स्वायम्भुवस्यास्य मनोर् दशैते वंशवर्धनाः //
jyotiṣmān dyutimān havyo medhā medhātithir vasuḥ svāyambhuvasyāsya manor daśaite vaṃśavardhanāḥ //
Jyotiṣmān, Dyutimān, Havya, Medhā, Medhātithi, and Vasu—these are counted among the ten lineage-enhancers (vaṃśa-vardhana) of this Svāyambhuva Manu.
This verse does not describe Pralaya directly; it belongs to the Manvantara-genealogy layer that preserves continuity of creation through Manu’s descendants (vaṃśa-vardhanāḥ).
By emphasizing “lineage-enhancers,” the verse reflects the Purāṇic ideal of sustaining social and ritual continuity—kings protect the line and order, while householders sustain progeny, rites, and dharma within the family line.
No Vāstu or temple-rule is stated here; the only ritual nuance is lexical—‘Havya’ echoes the language of offerings (havis), aligning these genealogies with sacrificial/ritual culture that the Purāṇas assume.