Manusmriti

siva.sh/manusmriti/4/245

उत्तमानुत्तमानेव गच्छन् हीनांस्तु वर्जयन् । ब्राह्मणः श्रेष्ठतामेति प्रत्यवायेन शूद्रताम् ॥ २४५ ॥

sanskrit

A Brahmana who always connects himself with the most excellent (ones), and shuns all inferior ones, (himself) becomes most distinguished; by an opposite conduct he becomes a Sudra.

english translation

uttamAnuttamAneva gacchan hInAMstu varjayan | brAhmaNaH zreSThatAmeti pratyavAyena zUdratAm || 245 ||

hk transliteration by Sanscript