Sahih Muslim 1986
Sahih Muslim · Book 36: The Book of Drinks · It is disliked to make Nabidh by mixing dried dates and raisins
وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، حَدَّثَنَا لَيْثٌ ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ ، أَخْبَرَنَا اللَّيْثُ ، عَنْ أَبِي الزُّبَيْرِ الْمَكِّيِّ ، مَوْلَى حَكِيمِ بْنِ حِزَامٍ عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ الأَنْصَارِيِّ ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ نَهَى أَنْ يُنْبَذَ الزَّبِيبُ وَالتَّمْرُ جَمِيعًا وَنَهَى أَنْ يُنْبَذَ الْبُسْرُ وَالرُّطَبُ جَمِيعًا .
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.