Imam Ahmad : 12535
حَدَّثَنَا بَهْزٌ حَدَّثَنَا حَمَّادٌ حَدَّثَنَا قَتَادَةُ عَنْ أَنَسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَمُرُّ بِالتَّمْرَةِ فَمَا يَمْنَعُهُ مِنْ أَخْذِهَا إِلَّا مَخَافَةُ أَنْ تَكُونَ صَدَقَةً
Narrated to us [Bahz] Narrated to us [Hammad] Narrated to us [Qatadah] from [Anas], The Messenger of Allah peace and blessings be upon him got a date, and there was nothing to stop him from taking it other than worrying about whether it might be a charity date.