Ibn 'Abbas (RAA) narrated, "A blind man had a pregnant slave, who used to Abuse the Messenger of Allah (ﷺ) and defame him. The blind man forbade her but she did not stop. One night she began to slander the Prophet (ﷺ) so he took an axe, placed it on her belly, pressed it and killed her. The Messenger of Allah (ﷺ) was told about it, and thereupon he said, "Oh people! Be witnesses that no Diyah is to be paid for her blood." Related by Abu Dawud with a trustworthy chain of narrators.