مسند أحمد

It was narrated that Salamah bin Kuhail said: I heard Hujayyah bin Adiyy say: I heard `Ali bin Abi Talib (رضي الله عنه) When a man asked him about a cow. He said: “(It may be sacrificed) on behalf of seven.” He asked him about the animal that is lame. He said: “If it can reach the place of sacrifice (then sacrifice it).” He was asked about the horn. He said: “It doesn`t matter.” And ‘Ali (رضي الله عنه) said: The Messenger of Allah (ﷺ) instructed us to check the eye and ear.