Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
muslim:1384 – ʿUbaydullāh b. Muʿādh / al-ʿAnbarī from my father > Shuʿbah > ʿAdī Wahū Ibn Thābit > ʿAbdullāh b. Yazīd > Zayd b. Thābit

It is Taiba, thereby meaning Medina. It drives away impurity just as fire removes the impurity of silver.  

مسلم:١٣٨٤ – وَحَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ وَهُوَ الْعَنْبَرِيُّ حَدَّثَنَا أَبِي حَدَّثَنَا شُعْبَةُ عَنْ عَدِيٍّ وَهُوَ ابْنُ ثَابِتٍ سَمِعَ عَبْدَ اللَّهِ بْنَ يَزِيدَ عَنْ زَيْدِ بْنِ ثَابِتٍ

عَنِ النَّبِيِّ ﷺ قَالَ إِنَّهَا طَيْبَةُ يَعْنِي الْمَدِينَةَ وَإِنَّهَا تَنْفِي الْخَبَثَ كَمَا تَنْفِي النَّارُ خَبَثَ الْفِضَّةِ