Muwatta Malik 1507
موطأ مالك#1507SahihMalik related to me from Ibn Shihab from Ubaydullah ibn Abdullah ibn Utba ibn Masud that Abdullah ibn Abbas said, "I heard Umar ibn al- Khattab say, 'Stoning is in the Book of Allah for those who commit adultery, men or women when they are muhsan and when there is clear proof of pregnancy or a confession
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: 41:8