Mahabharata 12.168.16

एवं पुत्राश्च पौत्राश्च ज्ञातयो बान्धवास्तथातेषु स्नेहो न कर्तव्यो विप्रयोगो हि तैर्ध्रुवम्

evaṃ putrāśca pautrāśca jñātayo bāndhavāstathāteṣu sneho na kartavyo viprayogo hi tairdhruvam

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