Musannaf Ibn Abi Shayba 16:78

Abu Bakr narrated to us, he said: Affan narrated to us, he said: Abu 'Awanah narrated to us, he said: Ya'la ibn 'Ata' narrated to us, from Waki' al-'Uqayli, from his paternal uncle Abu Razin—who is Laqit ibn 'Amir—that he said: "O Messenger of Allah, we used to slaughter sacrifices in Rajab, so we would eat from them and feed those who came to us." The Messenger of Allah (peace be upon him) said: "There is no harm in that." He said: So Waki' said: "I will never abandon it."