Sahih Muslim | Book 7 | Chapter 36

Narrated by Ibn Umar (Allah be pleased with him)
Ibn Umar (Allah be pleased with him) reported that Allah's Messenger may peace be upon him) spent the night at Dhi Tuwa till it was dawn and then entered Mecca. 'Abdullah (b. 'Umar) himself did like it. And in the narration transmitted by Ibn Sa'id (the words are): Until he observed the dawn prayer. Yahya (another narrator) said: Until it was dawn.

Narrated by Nafi'
Nafi' reported that Ibn Umar (Allah be pleased with them) did not enter Mecca without spending the night at Dhi Tawu until it was dawn, when he took a bath, and then entered Mecca in the morning, and made a mention that Allah's Apostle (may peace be upon him) did that.

Narrated by Abdullah (b. 'Umar)
Abdullah (b. 'Umar) reported that whenever Allah's Messenger (may peace be upon him) entered Mecca, he got down at Dhi Tuwa and spend the night there until he observed the dawn prayer. And Allah's Messenger (may peace be upon him) observed this prayer on a rough hillock, and not in the mosque which had been then built there, but to the lower side of it (the mosque) on a hillock.

Narrated by Nafi'
Nafi' reported that Abdullah (b. 'Umar) informed him that Allah's Messenger (may peace be upon him) turned his face to the two hillocks which intervened between him and the long mountain by the side of the Ka'ba, and the mosque which had been built there was thus on the left of the hillock. Allah's Messenger's (may peace be upon him) place of prayer was lower than the black hillock, at a distance of ten cubits or near it. He (may peace be upon him) would then observe prayer facing these two hillocks of the long mountain that is intervening between you and the Ka'ba.