It is narrated from Sayyiduna Abdullah bin Hawalah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "Whoever is saved from three things, he is saved (he said this three times): my death, the Dajjal, and the killing of a steadfast caliph upon the truth."
Hadith Referenceمسند احمد / مسند الشاميين / 16973
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف لجهالة أبى كثير ، وهذا من منكرات ثابت بن عجلان