Mahabharata 3.186.54
क्षीणे युगे महाराज तरुणा वृद्धशीलिनःतरुणानां च यच्छीलं तद्वृद्धेषु प्रजायते
kṣīṇe yuge mahārāja taruṇā vṛddhaśīlinaḥtaruṇānāṃ ca yacchīlaṃ tadvṛddheṣu prajāyate
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book