Sahih Muslim Book 23, Hadith Number 4936.

Chapter : It is forbidden to prepare Nabidh is varnished jar, gourd, green pitcher, and hollow stumps.

Thabit reported: I said to Ibn ‘Umar that Allah’s Messenger (may peace be upon him) had forbidden the preparation of Nabidh in the green pitcher (besmeared with pitch). He said: This is what they stated. I said: Did Allah’s Messenger (may peace be upon him) forbid this? He said: They said so.