IBN MALJAM ابن ملجم
The Muslim who slew the Kahlifah ‘Ali. The author of the Hayatu ‘l-Qulub (Merrick’s Translation, p. 204) says when ‘Ali was martyred by Ibn Muljam his celestial likeness (i.e. in the ‘Alamu ‘l-Misal) appeared wounded also; wherefore angels visit the similitude morning and evening and curse the name of Ibn Muljam.
Based on Hughes, Dictionary of Islam