Sahih al-Bukhari 6779
صحيح البخاري#6779SahihNarrated As-Sa'ib bin Yazid:We used to strike the drunks with our hands, shoes, clothes (by twisting it into the shape of lashes) during the lifetime of the Prophet, Abu Bakr and the early part of `Umar's caliphate. But during the last period of `Umar's caliphate, he used to give the drunk forty lashes; and when drunks became mischievous and disobedient, he used to scourge them eighty lashes
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: 86:8