مسند أحمد

It was narrated that Qatadah said: I heard Jurayy bin Kulaib narrate that ‘Ali (رضي الله عنه) said: The Messenger of Allah (ﷺ) forbade [for sacrifice] any animal that was missing most of its ear or horn. I asked Sa`eed bin al-Musayyab: What does missing most of its ear or horn mean? He said: When half or more [of an animal`s ear or horn] is missing.