Bhagavad Gita 1.43

दोषैरेतैः कुलघ्नानां वर्णसङ्करकारकैः।उत्साद्यन्ते जातिधर्माः कुलधर्माश्च शाश्वताः॥

doṣairetaiḥ kulaghnānāṃ varṇasaṅkarakārakaiḥ |utsādyante jātidharmāḥ kuladharmāśca śāśvatāḥ ||

By these evil deeds of the destroyers of the family, which cause confusion of castes, the eternal religious rites of the caste and the family are destroyed.

By the destruction of our lineage and the pollution of our blood, ancient class traditions and family purity alike perish.

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