"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»