Mahabharata 1.111.16

देहनाशे ध्रुवो नाशः पितॄणामेष निश्चयःइह तस्मात्प्रजाहेतोः प्रजायन्ते नरोत्तमाः

dehanāśe dhruvo nāśaḥ pitṝṇāmeṣa niścayaḥiha tasmātprajāhetoḥ prajāyante narottamāḥ

Our plain-language meaning of this verse is waiting for scholar review.