Madinah is Taabah (Hadith No. 1591)

Volume 3, Book 30, Number 96:
Narrated Abu Humaid (radiallaahu `anhu):
We came with the Prophet (sallallaahu `alayhi wasallam) from Tabuk, and when we reached near Medina, the Prophet (sallallaahu `alayhi wasallam) said, "This is Tabah."
Madinah has another name = Taabah.
It's like the Prophet (sallallaahu `alayhi wasallam) gave it a nickname. Shows his love for it. <3