Musannaf Ibn Abi Shayba 16:70

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Usama bin Zayd, from al-Qasim, he said: I asked him about the *‘Atirah*. He said: That is the *Rajibah*; the animal sacrifices of the people of the Jahiliyyah.