Hadith 5558
Chapter 9: Mixing Al-Busr and Dried Dates (At-Tamr) - كتاب الأشربة
أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا يَزِيدُ، قَالَ أَنْبَأَنَا حُمَيْدٌ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ الْبُسْرُ وَحْدَهُ حَرَامٌ وَمَعَ التَّمْرِ حَرَامٌ.
It was narrated that Ibn 'Abbas said:
"Al-Busr on their own are unlawful and with dried dates they are unlawful."
Reference : Sunan an-Nasa'i 5558
In-book reference : Book 51, Hadith 19