Sahih Muslim , Book 24, Hadith 5283 (USC-MSA) ⓘ
Jabir reported that there happened to pass before Allah's Apostle an ass the face of which had been cauterised, whereupon he said: Allah has cursed one who has cauterised it (on the face).
وَحَدَّثَنِي سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحَسَنُ بْنُ أَعْيَنَ، حَدَّثَنَا مَعْقِلٌ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم مَرَّ عَلَيْهِ حِمَارٌ قَدْ وُسِمَ فِي وَجْهِهِ فَقَالَ " لَعَنَ اللَّهُ الَّذِي وَسَمَهُ " .
also referenced under: Book 37, Hadith 163 (In-Book) & Hadith 2117 (Reference)