Yahya related to me from Malik from Nafi from Abdullah ibn Umarthat the Messenger of Allah, may Allah bless him and grant him peace,said "Whoever drinks wine in this world and does not turn from it intawba, it is haram for him in the Next World."
USC-MSA web (English) reference: Book 42, Hadith 11
Arabic reference: Book 42, Hadith 1550