Narrated Ibn 'Umar:
that the Messenger of Allah (ﷺ) mentioned the Fitnah and said: "This one will be wrongfully killed during it," about 'Uthman bin 'Affan [may Allah be pleased with him]. (ID)
English reference (ID): Vol. 1, Book 46, Hadith 3708 (ID)
Arabic reference (ID): Book 49, Hadith 4073 (ID)