Mishkat al-Masabih 10 The Rites of Pilgrimage كتاب المناسك 24

وَعَنْهُ قَالَ: وَقَّتَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لِأَهْلِ الْمَشْرِقِ الْعَقِيقَ. رَوَاهُ التِّرْمِذِيُّ وَأَبُو دَاوُد

He said that God’s messenger appointed al-‘Aqiq as the place where the people of the east should put on the ihram . Tirmidhi and Abu Dawud transmitted it.