The Prophet [SAW] forbade mixing dried dates and raisins, and Al-Busr and ripe dates. (Using translation from Nasāʾī 5554)  

أَنَّ النَّبِيَّ ﷺ «نَهَى عَنْ خَلِيطِ التَّمْرِ وَالزَّبِيبِ وَالْبُسْرِ وَالرُّطَبِ»  

[Machine] The Messenger of Allah ﷺ prohibited mixing the juice of grapes with the juice of fresh dates and mixing raisins with dates. Ali ibn Mubarak disagreed with him.  

أَنَّ رَسُولَ اللهِ ﷺ «نَهَى أَنْ يُخْلَطَ بَيْنَ الْبُسْرِ وَالرُّطَبِ وَبَيْنَ الزَّبِيبِ وَالتَّمْرِ» خَالَفَهُ عَلِيُّ بْنُ الْمُبَارَكِ  

[Machine] "The Prophet ﷺ said, 'Do not eat raisins and dates together, and do not eat fresh dates and dried dates together.' Uthman Ibn Umar contradicted this."  

أَنَّ النَّبِيَّ ﷺ قَالَ «لَا تَنْتَبِذُوا الزَّبِيبَ وَالتَّمْرَ جَمِيعًا وَلَا تَنْتَبِذُوا الرُّطَبَ وَالتَّمْرَ جَمِيعًا» خَالَفَهُ عُثْمَانُ بْنُ عُمَرَ  

Do not prepare Nabidh by mixing nearly ripe dates and fresh dates together, and do not prepare Nabidh by mixing grapes and dates together, but prepare Nabidh from each (one of them) separately. (Using translation from Muslim 1988a)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «لَا تَنْتَبِذُوا الزَّهْوَ وَالرُّطَبَ جَمِيعًا وَلَا تَنْتَبِذُوا الزَّبِيبَ وَالرُّطَبَ جَمِيعًا وَلَكِنِ انْتَبِذُوا كُلَّ وَاحِدٍ عَلَى حِدَةٍ»