Anas b. Malik reported that Allah's Messenger (ﷺ) forbade the preparation of Nabidh in gourd or varnished jar.
Sahih Muslim Book 36, Hadith 40
← Previous Hadith Ibn 'Umar reported that they were forbidden to prepare Nabidh by mixing dry dates and fresh dates and dates and grapes together.

Sahih Muslim Book 36, Hadith 39 Next Hadith → The above hadith is narrated through a different chain with slight variation in wording.

Sahih Muslim Book 36, Hadith 41