Abu Dawud Book 9, Hadith Number 2798.
Chapter : Disapproved sacrificial animals.
Narated By Ali ibn Abu Talib : The Apostle of Allah (PBUH) enjoined upon us to pay great attention to the eye and both ears, and not to sacrifice a one-eyed animal, and an animal with a slit which leaves something hanging at the front or back of the ear, or with a lengthwise slit with a perforation in the ear. I asked AbuIshaq: Did he mention an animal with broken horns and uprooted ears? He said: No.