Hadithcore
Sahih al-Bukhari, 5441b
sahih

Narrated Abu Huraira:

The Prophet (ﷺ) distributed dates among us, and my share was five dates, four of which were good, and one was a ,Hashafa, and I found the Hashafa the hardest for my teeth.

حَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ زَكَرِيَّاءَ، عَنْ عَاصِمٍ، عَنْ أَبِي عُثْمَانَ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَسَمَ النَّبِيُّ صلى الله عليه وسلم بَيْنَنَا تَمْرًا فَأَصَابَنِي مِنْهُ خَمْسٌ أَرْبَعُ تَمَرَاتٍ وَحَشَفَةٌ، ثُمَّ رَأَيْتُ الْحَشَفَةَ هِيَ أَشَدُّهُنَّ لِضِرْسِي‏.‏

References2 variants
In-Book Reference
Book 70, Hadith 70
USC-MSA web (English) reference
Vol. 7, Book 65, Hadith 353 (deprecated numbering scheme)