Shiva Purana
नावयोर्घटते सङ्गो काचकांचनयोरिव ॥ तुल्यजात्याकृतिकयोः संगः सौख्यप्रदो भवेत् ॥ २० ॥
The union between us is not proper as of a piece of worthless glass with gold. The sexual inion of two persons of the same class and features may be conducive to bliss.”
english translation
nAvayorghaTate saGgo kAcakAMcanayoriva ॥ tulyajAtyAkRtikayoH saMgaH saukhyaprado bhavet ॥ 20 ॥
hk transliteration by Sanscript