Ibn 'Abbas reported that Allah's Apostle ﷺ forbade the mixing of dates and grapes together, and mixing of unripe dates and ripe dates together (for preparing Nabidh), and he wrote to the people of Jurash (in Yemen) forbidding them to prepare the mixture of dates and grapes.
نَهَى النَّبِيُّ ﷺ أَنْ يُخْلَطَ التَّمْرُ وَالزَّبِيبُ جَمِيعًا وَأَنْ يُخْلَطَ الْبُسْرُ وَالتَّمْرُ جَمِيعًا وَكَتَبَ إِلَى أَهْلِ جُرَشَ يَنْهَاهُمْ عَنْ خَلِيطِ التَّمْرِ وَالزَّبِيبِ
"The Messenger of Allah [SAW] forbade mixing dried dates and raisins, and mixing Az-Zahuw and dried dates, and Az-Zahuw and Al-Busr."
نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يُخْلَطَ التَّمْرُ وَالزَّبِيبُ وَأَنْ يُخْلَطَ الزَّهْوُ وَالتَّمْرُ وَالزَّهْوُ وَالْبُسْرُ
"The Messenger of Allah [SAW] forbade Ad-Dubba', Al-Hantam, Al-Muzaffat, and An-Naqir, and that Al-Busr be mixed with dried dates, and that raisins be mixed with dried dates, and he wrote to the people of Hajar saying: 'Do not mix raisins and dried dates together.'" (Using translation from Nasāʾī 5557)
نَهَى رَسُولُ اللهِ ﷺ عَنِ الْبُسْرِ وَالتَّمْرِ أَنْ يُخْلَطَا جَمِيعًا وَعَنِ الزَّبِيبِ وَالتَّمْرِ أَنْ يُخْلَطَا جَمِيعًا قَالَ وَكَتَبَ إِلَى أَهْلِ جُرَشٍ أَنْ لَا يَخْلِطُوا الزَّبِيبَ وَالتَّمْرَ
[Machine] "The Messenger of Allah ﷺ wrote to the people of Jurash, forbidding them from mixing dates with raisins, and from mixing dates with "Busr"."
«كَتَبَ رَسُولُ اللهِ ﷺ إِلَى أَهْلِ جُرَشٍ يَنْهَاهُمْ عَنْ خَلِيطِ التَّمْرِ وَالزَّبِيبِ وَعَنِ التَّمْرِ وَالْبُسْرِ»
"The Messenger of Allah [SAW] forbade mixing dried dates and raisins, and mixing Az-Zahuw and dried dates, and Az-Zahuw and Al-Busr." (Using translation from Nasāʾī 5553)
«نَهَى رَسُولُ اللهِ ﷺ أَنْ يُخْلَطَ التَّمْرُ وَالزَّبِيبُ وَأَنْ يُخْلَطَ الزَّهْوُ وَالتَّمْرُ وَالزَّهْوُ وَالْبُسْرُ»
"نَهَى رَسُولُ الله ﷺ أَنْ يُخْلَطَ التَّمْرُ وَالزَّبِيبُ جَميعًا، وَأَنْ يُخْلَطَ الْبُسْرُ وَالزَّبيبُ جَميعًا، وَكَتَبَ إِلَى أَهْلِ الشَّامِ جُرشَ: يَنْهَاكُمْ عَنْ خَلْطِ التَّمْرِ وَالزَّبِيب".