It was reported from ‘Adbullāh bin QurT from the Prophet صلى الله عليه وسلم who said: “The greatest of all days before Allah is the Day of Nahr (Sacrifice), and then the Day of Qurr” – ‘Eisa (one of the narrators) said: “Thawr said: ‘It is the second day.'” – And he said: “Five, or six, sacrificial camels were brought to the Messenger of Allāh صلى الله عليه وسلم , so they began to come close to him, each one vying to be the first (to be slaughtered). After their sides had fallen (after they had been sacrificed), he said something gently which I could not understand, so I asked: ‘What did he say?’ Someone replied: ‘Whoever wishes may cut (some meat).'” (Sahīh)
Comments: Even camels knew the high station of the Messenger of Allāh صلى الله عليه وسلم , and felt honored to be slaughtered by his blessed hand.
Source: Sunan abu Dawud, 2/352, The rites of Hajj and ‘Umrah, Chapter 19, darussalam