Jami` at-Tirmidhi 1504
جامع الترمذي#1504Da'ifNarrated 'Ali:"The Messenger of Allah (ﷺ) prohibited that an animal with a A'dab (stump) horn or ear should be slaughtered as a sacrifice." Qatadah (one of the narrators) said: "So I mentioned this to Sa'eed bin Al-Musayyab and he said: 'The A'dab is that which equals or more than that
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirDaif
Al-AlbaniDaif
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiHasan
In-book reference: 19:15