Sahih Bukhari Volume 008, Book 081, Hadith Number 770.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 81. Limits and Punishments Set by Allah (Hudood)
Narrated By 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.