Mishkat al-Masabih 10 The Rites of Pilgrimage كتاب المناسك 226

وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: ” أُمِرْتُ بِقَرْيَةٍ تَأْكُلُ الْقُرَى. يَقُولُونَ: يَثْرِبَ وَهِيَ الْمَدِينَةُ تَنْفِي النَّاسَ كَمَا يَنْفِي الْكِيرُ خَبَثَ الْحَدِيدِ ”

Abu Huraira reported God’s messenger as saying, ” I have been commanded to go to a town which will devour all towns. People call it Yathrib, but it is Medina. It drives away people as the bellows drives away the impurity of iron.” Bukhari and Muslim.