It was narrated that Zaid bin Arqam said: "The Companions of the Messenger of Allah said: '0 Messenger of Allah, what are these sacrifices?' He said: 'The Sunnah of your father Ibrahim.' They said: 'What is there for us in them, 0 Messenger of Allah?' He said: 'For every hair, one merit.' They said: 'What about wool, 0 Messenger of Allah?' He said: 'For every hair of wool, one merit."