Verse 1.39
कुलक्षये प्रणश्यन्ति कुलधर्माः सनातनाः । धर्मे नष्टे कुलं कृत्स्नमधर्मोऽभिभवत्युत ॥ १.३९ ॥
कुल के नाश से सनातन कुल-धर्म नष्ट हो जाते हैं, धर्म के नाश हो जाने पर सम्पूर्ण कुल में पाप भी बहुत फैल जाता है ।
Arjuna explained: When one begins to destroy his own family, then his ancient, respected traditions, customs, moral values, principles, are destroyed as well. By the destruction of these, the whole family becomes evil and huge sins are committed.