Abu Yahya says that when a wretched and wicked man named Ibn Muljam made a murderous attack on Sayyiduna Ali (may Allah be pleased with him), Sayyiduna Ali (may Allah be pleased with him) said: "Treat him in the same way as the Prophet (peace and blessings be upon him) treated the person who intended to martyr him." Then he said: "Kill him and burn his corpse."
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 713
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف شريك، وهو ابن عبدالله النخعي- وعمران بن ظبيان