तथा षोडशहस्तः स्यान् मण्डपश्च चतुर्मुखः वेद्याश्च परितो गर्ता रत्निमात्रास्त्रिमेखलाः //
tathā ṣoḍaśahastaḥ syān maṇḍapaśca caturmukhaḥ vedyāśca parito gartā ratnimātrāstrimekhalāḥ //
同様に、マण्डパ(maṇḍapa)は十六ハスタ(hasta、肘尺)の長さとし、四面(四方に入口)を備えるべきである。祭壇台(vedī)の周囲には溝(garta)を設け、三重の周帯(tri-mekhalā)を巡らし、各帯はラトニ(ratni、掌幅)一つの寸法とする。
This verse does not discuss Pralaya; it belongs to the Matsya Purana’s Vastuvidya material, prescribing precise architectural/ritual measurements for a mandapa and vedī layout.
It supports the dharmic duty of patrons (kings/householders) to build and sponsor correctly proportioned ritual and temple structures; accurate measurements are treated as essential for auspiciousness and proper worship.
It specifies a standard mandapa size (16 hastas), a four-entranced plan (caturmukha), and a vedi arrangement with an encircling trench and three concentric bands/steps, each one ratni in measure—key Matsya Purana temple and ritual-platform design rules.