Volume 5 · Book 59 · Hadith 364
Narrated Anas bin Malik: Some people used to allot some date palm trees to the Prophet as gift till he conquered Banu Quraiza and Bani AnNadir, where upon he started returning their date palms to them.
— Sahih Bukhari, Volume 5, Book 59: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi), Hadith #364