I heard a man ask "Ali (رضي الله عنه): I bought this cow to offer it as a sacrifice. He said:[It may be offered on behalf of seven people. He said: [What if something is wrong with] the horn? He said: It does not matter. He said: [What if it is] lame? He said: If it can reach the place of sacrifice, then sacrifice it. Then he said: The Messenger of Allah (ﷺ) commanded us to check the eyes and ears.