Abu Dawud said: I heard Ahmad (b. Hanbal) say: The early reading is: Maliki yawmi'l-din.
In-book : Book 32, Hadith 33
English translation : Book 31, Hadith 3990
32. 'Dialects and Readings of the Qur''an (Kitab Al-Huruf Wa Al-Qira''at)'
باب التَّخَلِّي عِنْدَ قَضَاءِ الْحَاجَةِ