Musnad Ahmad 289:23

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