b 'The evil that men do lives after them.
Explanation:
You included no scenario but I believe this relates to Mark Anthony's speech to the Senate after the assassination of Julius Caesar.
His aim was to paint Caesar as a great and compassionate Roman who cared deeply for the Republic so that his assassinators would be put to shame and punished.
He did not, during his speech, justify Caesar's benevolence by saying that the evil that men did lived with them.