Yahya related to me from Malik that he had heard that the
Messenger of Allah, may Allah bless him and grant him peace, said once
at Mina, "This place (where I have just sacrificed), and the whole of
Mina, is a place of sacrifice," and he said once during umra, "This
place of sacrifice" meaning Marwa, "and all the pathways of Makka and
its roads are a place of sacrifice."
Muwatta Malik Book 20, Hadith 190