Muwatta Malik 182
موطأ مالك#182SahihYahya related to me from Malik from Hisham ibn Urwa that his father heard Abdullah ibn Amir ibn Rabia say, "We prayed subh behind Umar ibn al-Khattab and he recited suraYusuf (Sura 12) and surat al- Hajj (Sura 22) slowly." I (Hisham's father) said, "By Allah, then it must have been his habit to get up at the crack of dawn." He said, "Of course
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMauquf Sahih
In-book reference: 3:15