Sahih Muslim Book - 15, Hadith - 3047

حَدَّثَنَا مُحَمَّدُ بْنُ إِسْحَاقَ الْمُسَيَّبِىُّ حَدَّثَنِى أَنَسٌ - يَعْنِى ابْنَ عِيَاضٍ - عَنْ مُوسَى بْنِ عُقْبَةَ عَنْ نَافِعٍ أَنَّ عَبْدَ اللَّهِ أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- اسْتَقْبَلَ فُرْضَتَىِ الْجَبَلِ الَّذِى بَيْنَهُ وَبَيْنَ الْجَبَلِ الطَّوِيلِ نَحْوَ الْكَعْبَةِ يَجْعَلُ الْمَسْجِدَ الَّذِى بُنِىَ ثَمَّ يَسَارَ الْمَسْجِدِ الَّذِى بِطَرَفِ الأَكَمَةِ وَمُصَلَّى رَسُولِ اللَّهِ -صلى الله عليه وسلم- أَسْفَلَ مِنْهُ عَلَى الأَكَمَةِ السَّوْدَاءِ يَدَعُ مِنَ الأَكَمَةِ عَشْرَ أَذْرُعٍ أَوْ نَحْوَهَا ثُمَّ يُصَلِّى مُسْتَقْبِلَ الْفُرْضَتَيْنِ مِنَ الْجَبَلِ الطَّوِيلِ الَّذِى بَيْنَكَ وَبَيْنَ الْكَعْبَةِ -صلى الله عليه وسلم-.

It was narrated from Nafi that the Abdullah told him that the Messenger of Allah (SAW) turned to face two prominent points in the mountain that were between himself and the tall mountain, in the direction of the Kabah, putting the masjid that has been build there to the left of the masjid that is on the edge of the rough hillock. The place where the Messenger of Allah (SAW) offered prayers was lower than that, on the black hillock, ten cubits or so from the rough hillock. Then he (Ibn Umar) would pray facing the two prominent points in the tall mountain, which is between you and the Kabah.