Yahya related to me from Malik from Nafi that Abdullah ibn Umarsaid, "Someone who vows to sacrifice a camel or a cow to Allah shouldgarland it with two sandals about its neck, and brand it by causingblood to flow from its side. He should then sacrifice it either at theHouse or at Mina on the day of sacrifice. There are no other correctplaces apart from those. However, someone who vows to slaughter acamel or a cow simply as a sacrifice can sacrifice it wherever hewishes."
USC-MSA web (English) reference: Book 20, Hadith 191
Arabic reference: Book 20, Hadith 890