Muwatta Malik, Book 20, Hadith 187 (USC-MSA) ⓘ

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."

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ بِمِنًى ‏"‏ هَذَا الْمَنْحَرُ وَكُلُّ مِنًى مَنْحَرٌ ‏"‏ ‏.‏ وَقَالَ فِي الْعُمْرَةِ ‏"‏ هَذَا الْمَنْحَرُ - يَعْنِي الْمَرْوَةَ - وَكُلُّ فِجَاجِ مَكَّةَ وَطُرُقِهَا مَنْحَرٌ ‏"‏ ‏.‏