Sons, grandsons, kinsmen relatives, are all of this nature. One should One should never feel attachment for them, for separation with them is inevitable.
एवं पुत्राश्च पौत्राश्च ज्ञातयो बान्धवास्तथा। तेषां स्नेहो न कर्तव्यो विप्रयोगो ध्रुवो हि तैः॥