“For how many people is the offering of a camel (for sacrifice on the ‘Eid ul-Adha) enough of an offering?” Ar-Ridha’ (a.s.) replied, “One.” Then he asked, “What about offering a cow?” Ar-Ridha’ (a.s.) replied, “For five individuals it is enough, if they spend and eat together.” Then he asked, “Why does offering one cow suffice for five people while offering a camel does not?” Ar-Ridha’ (a.s.) replied, “It is because of the reason there lies behind a camel which does not lie behind a cow. The people of the Children of Israel who invited the people to worship the calf were five. They were all from the same home and they all ate together. They were Azinooneh, his brother Mabzooneh, his brother’s son, his daughter and his wife. They were the ones who invited the people to worship the calf. They were the same ones who killed the cow which God had ordered to be offered for sacrifice.”