Harun bin 'Abdullah al-Hamal هارون بن عبد الله بن مروان الحمال · Sacrifice (Kitab Al-Dahaya)

We were staying with the Messenger of Allah (ﷺ) at Arafat; he said: O people, every family must offer a sacrifice and an atirah. Do you know what the atirah is? It is what you call the Rajab sacrifice. Abu Dawud said: 'Atirah has been abrogated, and this tradition is an abrogated one.

The Jews came to the Prophet (ﷺ) and said: We eat which we kill but we do not eat which Allah kills? So Allah revealed: "Eat not of (meats) on which Allah's name hath not been pronounced." to the end of the verse.