It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) saw a donkey that had been branded on its face, and he (peace and blessings be upon him) said: "May Allah curse the one who has done this."
Hadith Referenceالمعجم الأوسط / باب العين / 4292
Hadith Takhrij«أخرجه الضياء المقدسي فى «الأحاديث المختارة» برقم: 1830، والبزار فى «مسنده» برقم: 7342»