"To hear no evil" means to be unaware or ignorant of any wrongdoing or bad behavior happening around you. It is often associated with turning a blind eye to the negative actions of others.
Sentences with «to hear no evil»
More than see no evil, the committee maintained its policy of hear no evil. (greenhellblog.com)
I actually had heard some evil things about them about having lousy support but at least when i tried they were good. (canadianprofiteer.com)
my monkey dad taught me see no evil speak no evil hear no evil whatever happened to the little atheistic monkey in me??? (religion.blogs.cnn.com)