कुलक्षये प्रणश्यन्ति कुलधर्मा: सनातना: ।
धर्मे नष्टे कुलं कृत्स्नमधर्मोऽभिभवत्य़ुत ।। १.४० ।।

kula-kṣaye praṇaśyanti kuladharmāḥ sanātanāḥ ।
dharme naṣṭe kulaṁ kṛtsnam adharmo' bhibhavatyutaḥ ।। 1.40 ।।

 Age-old rites of a lineage decline, when the
lineage is allowed to be extinct. When dharma
declines and go extinct, unrighteousness will
also/surely overtake the whole lineage.