Sahih Muslim
The Book of Drinks (Kitab Al-Ashriba)
Book Number: 023 / Hadith Number: 4899
Jabir b. Abdullah al-Ansari reported that Allah's Messenger (may peace be upon him) Prohibited the preparation of Nabidh by mixing grapes and fresh dates. and he forbade the preparation of Nabidh by mixing unripe dates with fresh dates.