Allah named Medina as Tabba.
Sahih Muslim Book 15, Hadith 561
← Previous Hadith It is Taiba, thereby meaning Medina. It drives away impurity just as fire removes the impurity of silver.

Sahih Muslim Book 15, Hadith 560 Next Hadith → He who intends to do harm to the people of this city (that is, Medina), Allah would efface him as salt is dissolved in water.

Sahih Muslim Book 15, Hadith 562