Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Arjuna’s Vishada Yoga Chapter 1, Verse 1.42.
Sanskrit
दोषैरेतैः कुलघ्नानां वर्णसङ्करकारकैः । उत्साद्यन्ते जातिधर्माः कुलधर्माश्च शाश्वताः ॥ १.४२ ॥
Hindi
इन वर्णसंकरकारक दोषों से कुलघातियों के सनातन कुल धर्म और जाती-धर्म नष्ट हो जाते हैं|
English
The everlasting traditions, customs and principles of a caste are destroyed when different castes join together and create mixed-blood generations. This leads to confusion of a caste’s customs.