Manusmriti

siva.sh/manusmriti/2/230

त एव हि त्रयो लोकास्त एव त्रय आश्रमाः । त एव हि त्रयो वेदास्त एवौक्तास्त्रयोऽग्नयः ॥ २३० ॥

sanskrit

For they are declared to be the three worlds, they the three (principal) orders, they the three Vedas, and they the three sacred fires.

english translation

ta eva hi trayo lokAsta eva traya AzramAH | ta eva hi trayo vedAsta evauktAstrayo'gnayaH || 230 ||

hk transliteration by Sanscript