It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that when the Prophet (peace and blessings be upon him) would come to Makkah Mukarramah, he would camp at "Dhi Tuwa", spend the night there, and also perform the Fajr prayer there. The place where the Prophet (peace and blessings be upon him) used to pray was on a large mound, not in the mosque that has now been built there, but rather below it, on a rough and large mound.