Muslim transmitted on the authority of 'Ali (RAA) concerning the story of al-Walid bin 'Uqbah that the Messenger of Allah inflicted forty lashes, Abu Bakr (RAA) forty lashes and 'Umar (RAA) eighty. All of them are in accordance with the Sunnah of the Prophet (ﷺ) but this one (the eighty lashes) is preferable to me.
English reference: Book 10, Hadith 1281
Arabic reference: Book 10, Hadith 1242