To run along the valley between two green pillars of Safa and Marwa (mountains) was not Sunna, but the people in the pre-islamic period of ignorance used to run along it, and used to say: "We do not cross this rain stream except running strongly. "
Reference: Sahih al-Bukhari 3847 In-book : Book 63, Hadith 73 USC-MSA web (English) : Vol. 5, Book 58, Hadith 186 (deprecated)
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