Have for Friends the Best of Men
76. If you see an intelligent man who tells you where true treasures are to be found, who shows what is to be avoided, and administers reproofs, follow that wise man; it will be better, not worse, for those who follow him.
77. Let him admonish, let him teach, let him forbid what is improper!–he will be beloved of the good, by the bad he will be hated.
78. Do not have evil-doers for friends, do not have low people for friends: have virtuous people for friends, have for friends the best of men.
Sacred Books of the East, Vol. 10: The Dhammapada and Sutta Nipata, by Max Müller and Max Fausböll, [1881], at sacred-texts.com
http://www.sacred-texts.com/bud/sbe10/sbe1008.htm