Sunan Abi Dawud

Narrated Umm Salamah, Ummul Mu'minin: The Messenger of Allah (ﷺ) used to recite: ""In the name of Allah, the Cherisher and Sustainer of the worlds; most Gracious, most Merciful; Master of the Day of Judgment,"" breaking its recitation into verses, one after another. Abu Dawud said: I heard Ahmad (b. Hanbal) say: The early reading is: Maliki yawmi'l-din