Ibn Abbas reported that Allah's Messenger (ﷺ) saw an ass which had been cauterised on the face. He disapproved of it saying:
By Allah, I do not cauterise (the animal) but on a part at a distance from the face, and commanded (for the cauterisation) of his ass and it was cauterised on the buttocks and he was the first to cauterise on the buttocks.
Reference: Sahih Muslim 2118 In-book : Book 37, Hadith 164 USC-MSA web (English) : Book 24, Hadith 5284 (deprecated)
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