Narrated Anas:
that the Prophet (ﷺ), Abu Bakr, and 'Umar - and I think he said - and 'Uthman would recite: "Maaliki Yawmid-Din (1:4).'" (JA)
English reference (JA): Vol. 5, Book 43, Hadith 2928 (JA)
Arabic reference (JA): Book 46, Hadith 3178 (JA)