Malik related to me from Nafi that Abdullah ibn Umar would spendthe night between the two trails in the valley of Dhu Tuwa when he wasapproaching Makka. Then he would pray subh, and after that he wouldenter Makka by the trail which is at the highest part of Makka. Hewould never enter Makka, if he was coming for hajj or umra, withoutdoing ghusl beforehand when he was near Makka at Dhu Tuwa, and hewould tell whoever was with him to do likewise.
USC-MSA web (English) reference: Book 20, Hadith 6
Arabic reference: Book 20, Hadith 713