Anas bin Malik reported,

I came to the Prophet ﷺ with a brother of mine for him to perform the tahnik on him, while he was in an enclosure of his. I saw him branding a sheep, and I think he said, on its ears.

Azami 14838

Sahih

عن أنس قال

دخلت على النبي ﷺ بأخ لي يحنكه وهو في مربد له، فرأيته يسم شاة- حسبته قال-: في آذانها.

الأعظمي 14838صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Superior moral conduct
Chapter
Kindness to animals
Section
Permissibility of branding on other than the face for identification
Numbering
Jami al-Kamil 14838 (2nd edition)
Azami 14838