The Messenger of Allah ﷺ forbade mixing of raisins and dried dates: and unripe dates and fresh dates.  

عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ نَهَى أَنْ يُنْتَبَذَ الزَّبِيبُ وَالتَّمْرُ جَمِيعًا وَنَهَى أَنْ يُنْتَبَذَ الْبُسْرُ وَالرُّطَبُ جَمِيعًا  

Make nabidh (drink) from each separately. He (the narrator Yahya) said: Abu Salamah bin 'Abd al-Rahman narrated to me this tradition on the authority of Abu Qatadah from the Prophet ﷺ  

وَقَالَ انْتَبِذُوا كُلَّ وَاحِدٍ عَلَى حِدَةٍ قَالَ وَحَدَّثَنِي أَبُو سَلَمَةَ بْنُ عَبْدِ الرَّحْمَنِ عَنْ أَبِي قَتَادَةَ عَنِ النَّبِيِّ ﷺ بِهَذَا الْحَدِيثِ  

A man from among the Companions of the Prophet ﷺ said: The Prophet ﷺ forbade (mixing) unripe dates and dried dates, and (mixing) raisins and dried dates.  

حَفْصٌ مِنْ أَصْحَابِ النَّبِيِّ ﷺ عَنِ النَّبِيِّ ﷺ قَالَ نَهَى عَنِ الْبَلَحِ وَالتَّمْرِ وَالزَّبِيبِ وَالتَّمْرِ  

Kabshah, daughter of AbuMaryam, asked Umm Salamah (Allah be pleased with her): What did the Prophet ﷺ prohibit? She replied: He forbade us to boil dates so much so that the kernels are spoiled, and to mix raisins and dried dates.  

سَأَلْتُ أُمَّ سَلَمَةَ مَا كَانَ النَّبِيُّ ﷺ يَنْهَى عَنْهُ قَالَتْ كَانَ يَنْهَانَا أَنْ نَعْجُمَ النَّوَى طَبْخًا أَوْ نَخْلِطَ الزَّبِيبَ وَالتَّمْرَ  

Raisins were steeped for the Messenger of Allah ﷺ and then dried dates were infused in them, or dried dates were steeped and then raisins were infused in them.  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُنْبَذُ لَهُ زَبِيبٌ فَيُلْقِي فِيهِ تَمْرًا وَتَمْرٌ فَيُلْقِي فِيهِ الزَّبِيبَ  

Safiyyah, daughter of Atiyyah, said: I entered upon Aisha with some women of AbdulQays, and asked her about mixing dried dates and raisins (for drink). She replied: I used to take a handful of dried dates and a handful or raisins and put them in a vessel, and then crush them (and soak in water). Then I would give it to the Prophet ﷺ to drink.  

دَخَلْتُ مَعَ نِسْوَةٍ مِنْ عَبْدِ الْقَيْسِ عَلَى عَائِشَةَ فَسَأَلْنَاهَا عَنِ التَّمْرِ وَالزَّبِيبِ فَقَالَتْ كُنْتُ آخُذُ قَبْضَةً مِنْ تَمْرٍ وَقَبْضَةً مِنْ زَبِيبٍ فَأُلْقِيهِ فِي إِنَاءٍ فَأَمْرُسُهُ ثُمَّ أَسْقِيهِ النَّبِيَّ ﷺ