Bhagavad-gītā 1.39
BG 1.39
Open the full passageकुलक्षये प्रणश्यन्ति कुलधर्माः सनातनाः । धर्मे नष्टे कुलं कृत्स्नमधर्मोऽभिभवत्युत ॥३९॥
Sanskrit
kula-kṣaye praṇaśyanti kula-dharmāḥ sanātanāḥ dharme naṣṭe kulaṁ kṛtsnam adharmo 'bhibhavaty uta
Translation
With the destruction of the dynasty, the eternal family tradition is vanquished, and thus the rest of the family becomes involved in irreligion.