Matsya Purana — Nārāyaṇa as Haṃsa in the Cosmic Ocean: Vedic Yajña-Puruṣa and Mārkaṇḍeya’s Vi...
पाणिभ्यामथ चाग्नीध्रं सुब्रह्मण्यं च जानुतः ग्रावस्तुतं तु पादाभ्याम् उन्नेतारं च याजुषम् //
pāṇibhyāmatha cāgnīdhraṃ subrahmaṇyaṃ ca jānutaḥ grāvastutaṃ tu pādābhyām unnetāraṃ ca yājuṣam //
With the hands (one should assign) the Agnīdhra; with the knees, the Subrahmaṇya; with the feet, the Grāvastut; and (also) the Yājuṣa Unnetṛ.
This verse is not about Pralaya; it gives a technical mapping of specific ṛtvij (priestly) functions used in Vedic sacrifice, emphasizing correct ritual order rather than cosmology.
It supports the dharmic duty of rulers and householders to sponsor sacrifices correctly by appointing qualified officiants (Agnīdhra, Subrahmaṇya, Grāvastut, Unnetṛ) according to established procedure.
Ritually, it specifies priest-roles linked to soma/fire operations and Yajurvedic performance; such precision is foundational for large rites (and by extension consecrations), where correct officiant assignment is considered essential for efficacy.