Matsya Purana — The Battle for Tripura: Portents
तदा भवपदन्यासाद् धयस्य वृषभस्य च पेतुः स्तनाश्च दन्ताश्च पीडिताभ्यां त्रिशूलिना //
tadā bhavapadanyāsād dhayasya vṛṣabhasya ca petuḥ stanāśca dantāśca pīḍitābhyāṃ triśūlinā //
Then, from Bhava’s (Śiva’s) stamping of his foot, the horse and the bull were so crushed by the trident-bearer that their udders and their teeth fell out.
This verse is not about Pralaya; it highlights Śiva’s overwhelming force in a mythic confrontation—his mere footstep and presence cause physical collapse in opposing forms.
Indirectly, it reinforces a Purāṇic ethic: power must be aligned with dharma—divine strength is portrayed as decisive and corrective, a model for rulers to act firmly against adharma while remaining duty-bound.
No explicit Vāstu or temple-building rule appears here; the key ritual-theological takeaway is the epithet Triśūlin and Bhava, supporting Śaiva liturgical remembrance of Śiva’s protective, subduing aspect.