Muslim mentioned from the hadith of Zaid bin Thabit on the authority of the Prophet, may God’s prayers and peace be upon him, who said that it is good, meaning Medina, and that it removes impurity just as fire removes impurity from silver.

And he, may God’s prayers and peace be upon him, said, “Medina is like a furnace that removes its impurity.” Its perfume is exquisite. Muslim narrated it from the hadith of Jabir