Confucius. Book 2, Chapter 19.
Book 2, Wei Chang
The duke Ai asked, saying, "What should be done in order to secure the submission of the people?" Confucius replied, "Advance the upright and set aside the crooked, then the people will submit. Advance the crooked and set aside the upright, then the people will not submit."
Text source: Lun Yu, The Confucian Analects. Translated by James Legge.