It is mustahab or preferable for one who has made a sacrifice not to eat anything on that day before he eats from it, if this is possible, because of the Hadith, “Let every man eat from his sacrifice.” (Sahih Al-Jami, 5349). He should eat after the Eid prayer and khutbah (sermon). This is the opinion of the scholars, including Ali, Ibn Abbas, Malik, Ash-Shafi’i, and others. The evidence for this is the Hadith of Buraydah (may Allah be pleased with him): “The Prophet (peace be upon him) would not go out on the Day of Fitr until he had eaten, and he would not eat on the day of Adha until he had slaughtered (his sacrifice).” It is better for a person to slaughter the sacrifice himself, but if he does not, it is mustahab for him to be present when it is slaughtered.
It is mustahab to divide the meat into three: one third for consumption, one third to be given as a gift and one third to be given in charity. This is the opinion of Ibn Mas’ud and Ibn Umar (may Allah be pleased with them). The scholars agreed that it is not permissible to sell anything from its meat, fat, or skin. The Prophet (peace be upon him) is reported to have said: “Whoever sells the skin of his Udhiyah, there is no Udhiyah for him (i.e., it is not counted as Udhiyah).” (Sahih Al-Jami, 6118). The butcher should not be given anything of it by way of reward or payment, because Ali (may Allah be pleased with him) said: “The Messenger of Allah (peace be upon him) commanded me to take care of the sacrifice and to give its meat, skin in charity, and not to give anything of it to the butcher as a compensation. He said, ” We will give him something from what we have.” (Al-Bukhari and Muslim).
It was said that it is permissible to give the butcher something as a gift, and that it is permissible to give some of it to a non-Muslim if he is poor or a relative or a neighbor, or in order to open up his heart to Islam.