Matsya Purana — The Burning of Tripura: Maya’s Triple Fortresses and the Boon that Leads to S...
देवैस्तथा विधातव्यं मया मतिविचारणम् विस्तारो योजनशतम् एकैकस्य पुरस्य तु //
devaistathā vidhātavyaṃ mayā mativicāraṇam vistāro yojanaśatam ekaikasya purasya tu //
So too, in accordance with the gods’ ordinance, I have determined this plan after due consideration: the extent of each city, indeed, is to be one hundred yojanas.
This verse is not about Pralaya; it belongs to the Vāstu/settlement-planning material, giving a normative measurement for the size (vistāra) of a city.
It supports the king’s duty of orderly governance—founding and regulating towns with standardized dimensions, implying planned infrastructure and defensible, well-proportioned settlements.
Architecturally, it states a planning standard: each city’s prescribed extent is “one hundred yojanas,” presented as an ordinance aligned with divine/authoritative norms.