You will not take birth again in the form of your sons and grandsons, like a sprout taking birth from a seed and then generating a new seed. Rather, you are entirely distinct from the material body and its paraphernalia, in the same way that fire is distinct from its fuel.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
न भविष्यसि भूत्वा त्वं पुत्रपौत्रादिरूपवान् । बीजाङ्कुरवद्देहादेर्व्यतिरिक्तो यथानलः
na bhaviṣyasi bhūtvā tvaṃ putrapautrādirūpavān | bījāṅkuravaddehādervyatirikto yathānalaḥ
SB 12.5.3