Partners of oppression

It is narrated from Imam Sadiq (A.S) who said: The oppressor (those who oppress others by any means), his/her assistants (those who actively take part and help the oppressors) and those who are satisfied with the oppression (see the oppression but do not do or say anything against it) are all partners of oppression [1].
 [1] Wasa'elol Shia, Vol. 11, Page 345.