Bhagavad Gita 1.40

कुलक्षये प्रणश्यन्ति कुलधर्मा: सनातन: |
धर्मे नष्टे कुलं कृत्स्नमधर्मोऽभिभवत्युत

Translation

When a dynasty is destroyed, its traditions get vanquished, and the rest of the family becomes involved in irreligion.