Sahih Muslim 1991
Sahih Muslim · Book 36: The Book of Drinks · It is disliked to make Nabidh by mixing dried dates and raisins
وَحَدَّثَنِي أَبُو بَكْرِ بْنُ إِسْحَاقَ ، حَدَّثَنَا رَوْحٌ ، حَدَّثَنَا ابْنُ جُرَيْجٍ ، أَخْبَرَنِي مُوسَى بْنُ، عُقْبَةَ عَنْ نَافِعٍ ، عَنِ ابْنِ عُمَرَ ، أَنَّهُ قَالَ قَدْ نُهِيَ أَنْ يُنْبَذَ الْبُسْرُ وَالرُّطَبُ جَمِيعًا وَالتَّمْرُ وَالزَّبِيبُ جَمِيعًا .
Ibn 'Umar reported that they were forbidden to prepare Nabidh by mixing dry dates and fresh dates and dates and grapes together.