Matsya Purana — Bhīma-Dvādaśī
भविता स तदा ब्रह्मन् कर्ता चैव वृकोदरः प्रवर्तको ऽस्य धर्मस्य पाण्डुपुत्रो महाबलः //
bhavitā sa tadā brahman kartā caiva vṛkodaraḥ pravartako 'sya dharmasya pāṇḍuputro mahābalaḥ //
O Brahmin, at that time Vṛkodara (Bhīma), the mighty son of Pāṇḍu, will become the executor and the chief promoter of this Dharma.
This verse does not discuss pralaya or cosmology; it focuses on a prophetic-historical theme, stating that Bhīma (Vṛkodara) will act as a leading agent in advancing dharma.
By portraying a heroic figure as the 'kartā' and 'pravartaka' of dharma, the verse reinforces the Purāṇic ideal that rulers and powerful leaders must actively establish and promote righteous order, not merely possess strength.
No Vāstu, temple-building, iconographic, or ritual procedure is specified here; the emphasis is ethical and political—leadership in the propagation of dharma.