The Prophet ﷺ forbade the drinking of alcoholic drinks prepared from raisins, dates, unripe dates and fresh ripe dates.  

أَنَّهُ سَمِعَ جَابِرًا ؓ يَقُولُ نَهَى النَّبِيُّ ﷺ عَنِ الزَّبِيبِ وَالتَّمْرِ وَالْبُسْرِ وَالرُّطَبِ  

The Prophet ﷺ forbade the mixing of ripe and unripe dates and also the mixing of dates and raisins (for preparing a syrup) but the syrup of each kind of fruit should be prepared separately. ( One may have such drinks as long as it is fresh )  

نَهَى النَّبِيُّ ﷺ أَنْ يُجْمَعَ بَيْنَ التَّمْرِ وَالزَّهْوِ وَالتَّمْرِ وَالزَّبِيبِ وَلْيُنْبَذْ كُلُّ وَاحِدٍ مِنْهُمَا عَلَى حِدَةٍ