Matsya Purana — The Slaying of Jambha and the Rise of Tāraka: Divine Battle Formations
त्वाष्ट्रस्य निर्मितान्याशु यन्त्राणि तदनन्तरम् तेनोपलनिपातेन गतानि तिलशस्ततः //
tvāṣṭrasya nirmitānyāśu yantrāṇi tadanantaram tenopalanipātena gatāni tilaśastataḥ //
Then, immediately afterward, the mechanical contrivances fashioned by Tvaṣṭṛ were struck by a shower of stones; and by that hail of rocks they were shattered and scattered into fragments, like sesame seeds.
It uses a destruction motif—machines smashed by a stone-fall—showing how even sophisticated creations can be rapidly reduced to fragments; it echoes the Purāṇic theme of impermanence seen in larger dissolutions, though this verse itself describes a localized ruin rather than cosmic pralaya.
Indirectly, it warns that reliance on mere technology without protection, dharma, and prudent governance is fragile—kings and householders must secure works (fortifications, planning, safeguards) and not assume permanence of material achievements.
The key technical term is yantra (engineered device). The verse highlights the Matsya Purana’s interest in construction/engineering vocabulary (useful for Vastuvidya reading), and frames yantras as powerful yet vulnerable to impact forces—an implicit caution about durability and protective design.