Sahih al-Bukhari 24:85
Narrated Abu Huraira:
Dates used to be brought to Allah's Messenger (ﷺ) immediately after being plucked. Different persons would bring their dates till a big heap collected (in front of the Prophet). Once Al-Hasan and Al-Husain were playing with these dates. One of them took a date and put it in his mouth. Allah's Messenger (ﷺ) looked at him and took it out from his mouth and said, "Don't you know that Muhammad's offspring do not eat what is given in charity?"
Reference
Sahih al-Bukhari 24:85
In-book reference
Book 24, Hadith 85
Arabic Text
حَدَّثَنَا عُمَرُ بْنُ مُحَمَّدِ بْنِ الْحَسَنِ الأَسَدِيُّ، حَدَّثَنَا أَبِي، حَدَّثَنَا إِبْرَاهِيمُ بْنُ طَهْمَانَ، عَنْ مُحَمَّدِ بْنِ زِيَادٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُؤْتَى بِالتَّمْرِ عِنْدَ صِرَامِ النَّخْلِ فَيَجِيءُ هَذَا بِتَمْرِهِ وَهَذَا مِنْ تَمْرِهِ حَتَّى يَصِيرَ عِنْدَهُ كَوْمًا مِنْ تَمْرٍ، فَجَعَلَ الْحَسَنُ وَالْحُسَيْنُ ـ رضى الله عنهما ـ يَلْعَبَانِ بِذَلِكَ التَّمْرِ، فَأَخَذَ أَحَدُهُمَا تَمْرَةً، فَجَعَلَهَا فِي فِيهِ، فَنَظَرَ إِلَيْهِ رَسُولُ اللَّهِ صلى الله عليه وسلم فَأَخْرَجَهَا مِنْ فِيهِ فَقَالَ " أَمَا عَلِمْتَ أَنَّ آلَ مُحَمَّدٍ صلى الله عليه وسلم لاَ يَأْكُلُونَ الصَّدَقَةَ ".