Sahih al-Bukhari 6896
صحيح البخاري#6896SahihIbn 'Umar said:A boy was assassinated. 'Umar said, "If all the people of San'a took part in the assassination I would kill them all." Al-Mughira bin Hakim said that his father said, "Four persons killed a boy, and 'Umar said (as above)." Abu Bakr, Ibn Az-Zubair, 'Ali and Suwaid bin Muqarrin gave the judgement of Al-Qisas (equality in punishment) in cases of slapping. And 'Umar carried out Al-Qisas for a strike with a stick. And 'Ali carried out Al-Qisas for three lashes with a whip. And Shuraih carried out for one last and for scratching
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 87:35