BG 1.41
अधर्माभिभवात्कृष्ण प्रदुष्यन्ति कुलस्त्रियः
स्त्रीषु दुष्टासु वार्ष्णेय जायते वर्णसंकरः
adharmābhibhavātkṛṣṇa praduṣyanti kulastriyaḥ
strīṣu duṣṭāsu vārṣṇeya jāyate varṇasaṃkaraḥ
TRANSLATION
When lawlessness prevails, O Krishna, the women of the clan become corrupt; when women become corrupt, there arises intermixture of classes.