Hadith 8:3021
Abu Bakr narrated to us, he said: Waki’ narrated to us, from Nafi’ ibn ‘Umar, from ‘Amr ibn Dinar, he said: I saw Ibn ‘Umar, after he had grown old, slaughtering it [the camel] while it was kneeling.
حدثنا أبو بكر قال نا وكيع عن نافع بن عمر عن عمرو بن دينار قال رأيت بن عمر بعد ما كبر ينحرها باركة