Arthashastra
कन्यायां समान जातीयाद् अपत्यम् उत्पाद्य वा अभिषिञ्चेत् ॥
Or he may install a child begotten on the princess by a man of the same caste.
english translation
kanyAyAM samAna jAtIyAd apatyam utpAdya vA abhiSiJcet ॥
hk transliteration by Sanscript