Amr bin Dinar عمرو بن دينار الأثرم الجمحي · The Book of al-Fara' and al-'Atirah

"My father narrated to me from his grandfather, Al-Harith bin 'Amr that he met the Messenger of Allah during the Farewell Pilgrimage and said: 'May my father and mother be sacrificed for you! O Messenger of Allah; pray for forgiveness for me.' He said: 'May Allah forgive you (plural).' He was atop his slit-eared camel and I came around to the other side"' and he quoted the Hadith.

"It was said to the prophet: 'During the Jahiliyyah we used to offer the 'Atirah.' He said: 'Slaughter for the sake of Allah, the Mighty and sublime, no matter what month it is; do good for the sake of Allah, the Mighty and sublime, and feed the poor."'

"The Prophet said: 'The dead animal is purified by tanning it."'