Hadith 5624
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace and blessings be upon him) saw a donkey that had been branded on its face, so he strongly condemned this. The owner said: By Allah, now I will brand it on that part of its body which is farthest from the face. So, by his order, the donkey was branded on its thighs (where the tail reaches when it moves). Thus, it was the first animal to be branded on its thighs.