Manusmriti
स महीमखिलां भुञ्जन् राजर्षिप्रवरः पुरा । वर्णानां सङ्करं चक्रे कामोपहतचेतनः ॥ ६७ ॥
That chief of royal sages who formerly possessed the whole world, caused a confusion of the castes (varna), his intellect being destroyed by lust.
english translation
sa mahImakhilAM bhuJjan rAjarSipravaraH purA । varNAnAM saGkaraM cakre kAmopahatacetanaH ॥ 67 ॥
hk transliteration by Sanscript