Mahabharata 12.149.41
यौवनस्थांश्च बालांश्च वृद्धान्गर्भगतानपिसर्वानाविशते मृत्युरेवंभूतमिदं जगत्
yauvanasthāṃśca bālāṃśca vṛddhāngarbhagatānapisarvānāviśate mṛtyurevaṃbhūtamidaṃ jagat
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book