Sahih Muslim | Book 7 | Chapter 42

Narrated by Jabir b. 'Abdullah
Jabir b. 'Abdullah reported that Allah's Apostle (may peace be upon him) and his Companions did not observe Sa'i between al-Safa' and al-Marwa but only one Sa'i.

Narrated by Ibn Juraij
Ibn Juraij reported on the same authority a hadith like that, and said: But one Tawaf and that was the first Tawaf.