Bhagavad Gita Chapter 1 Verse 41
भगवद् गीता अध्याय 1 श्लोक 41

अधर्माभिभवात्कृष्ण प्रदुष्यन्ति कुलस्त्रियः।
स्त्रीषु दुष्टासु वार्ष्णेय जायते वर्णसङ्करः।।1.41।।



हिंदी अनुवाद - स्वामी तेजोमयानंद
।।1.41।।हे कृष्ण  पाप के अधिक बढ़ जाने से कुल की स्त्रियां दूषित हो जाती हैं और हे वार्ष्णेय  स्त्रियों के दूषित होने पर वर्णसंकर उत्पन्न होता है।


Kumara Vaishnava Sampradaya - Commentary
In regard to the result of undesirable progeny. The intermixture  of  castes
that  follow the family customs and honor the age-old Vedic traditions  with
those that do not causes a degradation in society and leads the family to  a
hellish existence. Not only this but the anscestors of such  a  family  also
suffer as well because there is  no  descendant  qualified  to  perform  the
propitiatory rites prescribed in  Vedic  scriptures  such  as  sraddha   and
tarpana. .  Being  deprived  of  these  oblations  due  to  the  absence  of
qualified progeny as a result of destruction of  the  family  structure  the
ancestors fall down from heaven and go directly to the hellish planets.