(5) باب كَرَاهَةِ انْتِبَاذِ التَّمْرِ وَالزَّبِيبِ مَخْلُوطَيْنِ
Jabir b. Abdullah al-Ansari reported that Allah's Messenger (ﷺ) 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.
Reference: Sahih Muslim 1986 d
In-book reference: Book 36, Hadith 22
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 4899