مسند أحمد

It was narrated that ‘Ali (رضي الله عنه) said: The Messenger of Allah (ﷺ) commanded us to check the eyes and ears (of sacrificial animals), and told us not to sacrifice any that is one-eyed, or any muqabalah, mudabarah, sharqa’ or kharqa`. Zuhair said: “I said to Abu Ishaq, “Did he mention the one with its nose [or ear or lip] cut off?” He said: “No”, I said: “What is al-muqabalah?” He said: “One that has the edge of its ears cut.” I said: “What is al-mudabarah?” He said: “One whose ears are slit from the back.” I said: “What is ash-sharqa`?” He said: “One whose ears are slit in two lengthwise.” I said: “What is al-kharqa`?” He said: “One that has a round hole in its ear as a distinguishing mark.””