Ibn Umar came upon a man slaughtering his sacrificial camel while it was kneeling. He said, "Make it stand up with one leg tied, the way of your Prophet ﷺ."
أن ابن عمر أتى على رجل وهو ينحر بدنته باركة، فقال: ابعثها قياما مقيدة، سنة نبيكم ﷺ.
Bukhari narrated it in the Hajj chapter (1713) and Muslim narrated it in the Hajj chapter (1320), both through Yunus (that is, Ibn Ubayd the Abdi, the Basran), from Ziyad bin Jubayr, who narrated it as mentioned. The wording given is that of Muslim.