yán​zhě​wú​zuì​wén​zhě​zú​jiè

don't blame the speaker, take note of his warning

言者无罪,闻者足戒 言者無罪,聞者足戒 yán​zhě​wú​zuì​wén​zhě​zú​jiè
don't blame the speaker, take note of his warning
The person speaking should not be punished for their opinions, while the person listening should take the words as a lesson; an exhortation to speak one's mind without fear of reprisals.