Sahih Muslim , Book 5, Hadith 2339 (USC-MSA) ⓘ
Abu Huraira reported that Hasan b. 'Ali took one of The dates of the sadaqa and put it in his mouth, whereupon the Prophet said: Leave it, leave it, throw it; don't you know that we do not eat the sadaqa?
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ الْعَنْبَرِيُّ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنْ مُحَمَّدٍ، - وَهُوَ ابْنُ زِيَادٍ - سَمِعَ أَبَا هُرَيْرَةَ، يَقُولُ أَخَذَ الْحَسَنُ بْنُ عَلِيٍّ تَمْرَةً مِنْ تَمْرِ الصَّدَقَةِ فَجَعَلَهَا فِي فِيهِ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " كِخْ كِخْ ارْمِ بِهَا أَمَا عَلِمْتَ أَنَّا لاَ نَأْكُلُ الصَّدَقَةَ " .
also referenced under: Book 12, Hadith 210 (In-Book) & Hadith 1069 (Reference)