Yahya related to me from Malik that he had heard that theMessenger of Allah, may Allah bless him and grant him peace, said onceat Mina, "This place (where I have just sacrificed), and the whole ofMina, is a place of sacrifice," and he said once during umra, "Thisplace of sacrifice" meaning Marwa, "and all the pathways of Makka andits roads are a place of sacrifice."
USC-MSA web (English) reference: Book 20, Hadith 187
Arabic reference: Book 20, Hadith 886