Narrated Ibn Abi Mulaikah:
that Umm Salah said: "The Messenger of Allah (SA) would separate recitation reciting: 'Al-Hamdulillahi Rabbil-'Alamin' then he would stop. 'Ar-Rahmanir-Rahim' then he would stop. And he would recite it: 'Maliki Yawmid-Din.'" (FR)
English reference (FR): Vol. 5, Book 43, Hadith 2927 (FR)
Arabic reference (FR): Book 46, Hadith 3177 (FR)