Maliks Muwatta Book 20, Hadith Number 187.

Section : Sacrificing during the Hajj.

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.”