Yahya related to me from Malik from al-Ala ibn Abd ar-Rahman ibnYaqub from his father from Abu Hurayra that the Messenger of Allah,may Allah bless him and grant him peace, forbade preparing nabidh in agourd or in a jug smeared with pitch.
USC-MSA web (English) reference: Book 42, Hadith 6
Arabic reference: Book 42, Hadith 1545