Sahih Muslim Book 7, Hadith Number 3120.

Chapter : Staying at Dhu’l-Halaifa and observing of prayer there, while returning from Hajj or Umra.

Abdullah b. ‘Umar (Allah be pleased with them) reported that Allah’s Messenger (may peace be upon him) made (his camel) kneel down (i.e. halt at the stony ground of Dhu’l-Hulaifa) and prayed there, and so did Abdullah b. Umar (Allah be pleased with them).