Sahih Al Bukhari Hadith Number 1648

Narrated `Asim: I asked Anas bin Malik: “Did you use to dislike to perform Tawaf between Safa and Marwa?” He said, “Yes, as it was of the ceremonies of the days of the Pre-Islamic period of ignorance, till Allah revealed: ‘Verily! (The two mountains) As-Safa and Al-Marwa are among the symbols of Allah. It is therefore no sin for him who performs the pilgrimage to the Ka`ba, or performs `Umra, to perform Tawaf between them.’ ” (2.158)

25  Hajj (Pilgrimage)
Hadith number 1648
Volume no 2
Chapter: 80 (Sa’i between As-Safa and Al-Marwa)