Wadah bin 'Abdullah al-Yashkari وضاح بن عبد الله اليشكري أبو عوانة · The Book of ad-Dahaya (Sacrifices)

"Messenger of Allah forbade us from sacrificing an animal with a broken horn." I (the narrator) mentioned that to Sa'eed bin Al_Musayyab and he said: "Yes, m unless half or more of the horn is missing."

"The Messenge of Allah addressed us on the Day of Sacrifice, and he went toward two Amlah rams and sacrificed them." An abridgment. (Sahih )