وَهُوَ أَنْ يُشَقَّ سَنَامُهَا مِنَ الْجَانِبِ الْأَيْمَنِ
Translation: Ishʿar meant making an incision on the right side of the animal’s hump.
Sanam denotes an animal’s hump; al-janib al-ayman means the right side. This is a definition in a historical legal text, not practical advice to injure or mark an animal today.