Verse 66

अनारतपतद्रूपा दिशो दृष्टा विनश्वराः ।विनाशीदं जगत्सर्वमिति किं नोपपद्यते

In plain words

The quarters of space are seen with forms ceaselessly falling away, perishable — so why should it not follow that this whole world is perishable?