It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) saw a donkey that had been branded on its face and whose nostrils had been burnt, and the Prophet (peace and blessings be upon him) said: "May Allah curse the one who did this. Did I not forbid that anyone should brand the face or strike the face?"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الصدقات / 13259