It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them) that Sayyiduna Umar (may Allah be pleased with him) gave a horse in charity during the time of the Messenger of Allah (peace and blessings be upon him), and later found it being offered for sale. He mentioned this to the Messenger of Allah (peace and blessings be upon him), and he said: "Do not buy it and do not go near it."
Hadith Referenceالسنن المأثورة / باب ما جاء في صدقة الفطر / 373
Hadith Takhrijصحیح بخاری، الوصایا، باب وقف الدواب والکراع والعروض والصامت، رقم : 2775