Hadith 8:3028
Abu Bakr narrated to us, he said: Abd al-A’la narrated to us, from Yunus, from Ziyad ibn Jubayr, that Ibn Umar came upon a man who had made his sacrificial camel kneel. He said: "Slaughter it while it is standing; [this is] the Sunnah of Muhammad, may Allah bless him and grant him peace."
حدثنا أبو بكر قال نا عبد الأعلى عن يونس عن زياد بن جبير أن بن عمر أتى على رجل قد أناخ بدنته فقال انحرها قياما سنة محمد صلى الله عليه وسلم