The Messenger of Allah ﷺ prohibited to accept ja'rur and habiq dates as zakat. Az-Zuhri said: These are two kinds of the dates of Medina. Abu Dawud said: This has also been transmited by Abu al-Walid from Sulaiman bin Kathir from Az-Zuhri.  

نَهَى رَسُولُ اللَّهِ ﷺ عَنِ الْجُعْرُورِ وَلَوْنِ الْحُبَيْقِ أَنْ يُؤْخَذَا فِي الصَّدَقَةِ قَالَ الزُّهْرِيُّ لَوْنَيْنِ مِنْ تَمْرِ الْمَدِينَةِ  

The Messenger of Allah ﷺ entered upon us in the mosque, and he had a stick in his hand. A man hung there a bunch of hashaf. He struck the bunch with the stick, and said: If the owner of this sadaqah (alms) wishes to give a better one than it, he would give. The owner of this sadaqah will eat hashaf on the Day of Judgment.  

دَخَلَ عَلَيْنَا رَسُولُ اللَّهِ ﷺ الْمَسْجِدَ وَبِيَدِهِ عَصًا وَقَدْ عَلَّقَ رَجُلٌ مِنَّا قِنًا حَشَفًا فَطَعَنَ بِالْعَصَا فِي ذَلِكَ الْقِنْوِ وَقَالَ لَوْ شَاءَ رَبُّ هَذِهِ الصَّدَقَةِ تَصَدَّقَ بِأَطْيَبَ مِنْهَا وَقَالَ إِنَّ رَبَّ هَذِهِ الصَّدَقَةِ يَأْكُلُ الْحَشَفَ يَوْمَ الْقِيَامَةِ