I saw Ali sacrificing two rams and asked him the meaning of it. He replied, “God’s Messenger enjoined me to sacrifice on his behalf, so that is what I am doing.”
Abu Dawud transmitted it, and Tirmidhi transmitted something similar.
Jabir said that on the day of sacrifice the Prophet sacrificed two horned rams which were white with black markings and had been castrated. Then when he made them face the qibla he said, “I have turned my face towards Him who created the heavens and the earth, following Abraham’s religion as a hanif, and I am not one of the polytheists. My prayer, my religious rites, my life and my death belong to God, the Lord of the universe, who has no partner. That is what I was commanded to do, and I am one of the Muslims (Al-Qur’an; 6:161-163). O God, it comes from Thee and is given to Thee from Muhammad and his people. In the name of God, and God is most great.” Then he made sacrifice.
Ahmad, Abu Dawud, Ibn Majah and Darimi transmitted it. A version by Ahmad, Abu Dawud and Tirmidhi says that he sacrificed with his own hand and said, “In the name of God, and God is most great. O God, this is from me and from those of my people who have not sacrificed.”
'Ali said, “God’s Messenger enjoined us to pay great attention to the eye and the ear, and not sacrifice an animal with a slit which leaves something hanging at the front or back of the ear, or with a lengthwise slit or a perforation in the ear."
Tirmidhi, Abu Dawud, Nasa’i, Darimi and Ibn Majah transmitted it, but Ibn Majah's words ended with "and the ear.”
Ibn ‘Abbas reported God's Messenger as saying, “There are no days in which a good deed is more pleasing to God than these ten days.” On being asked whether not even jihad in God’s path were as pleasing, he replied, “Not even jihad in God’s path, except when a man goes out in person with his property and loses both life and property.”