From Sahih Muslim (Hadith 4452):
Anas b. Malik reported that a person who had drink wine was brought to Allah's Apostle (ﷺ). He gave him forty stripes with two lashes. Abu Bakr also did that, but when Umar (assumed the responsibilities) of the Caliphate, he consulted people and Abd al-Rahman said:The mildest punishment (for drinking) is eighty (stripes) and 'Umar their prescribed this punishment
Reference: Muslim 4452