Taken from Virtues of Madinah of Sahih Bukhari

Medina is a sanctuary from that place to that.
Its trees should not be cut.
No heresy should be innovated nor any sin should be committed in it.
Whoever innovates in it an heresy or commits a sin, or gives shelter to such an innovator in it will incur the curse of Allah,the angels, and all the people, none of his compulsory or optional good deeds of worship will be accepted.

The Prophet peace be upon him said,

“I have made Medina a sanctuary between its two (Harrat) mountains.”
Allah’s Apostle , peace be upon him, “Verily, Belief returns and goes back to Medina as a snake returns and goes back to its hole (when in danger).”

“None plots against the people of Medina but that he will be dissolved (destroyed) like the salt is dissolved in water.”

“The terror caused by Al-Masih Ad-Dajjal will not enter Medina and at that time Medina will have seven gates and there will be two angels at each gate guarding them.”

“There are angels guarding the entrances (or roads) of Medina, neither plague nor Ad-Dajjal will be able to enter it.”

“There will be no town which Ad-Dajjal will not enter except Mecca and Medina, and there will be no entrance (road) (of both Mecca and Medina) but the angels will be standing in rows guarding it against him, and then Medina will shake with its inhabitants thrice (i.e. three earth-quakes will take place) and Allah will expel all the nonbelievers and the hypocrites from it.”

“Medina is like a furnace, it expels out the impurities (bad persons) and selects the good ones and makes them perfect.”

“Medina expels the bad persons from it, as fire expels the impurities of iron.”

The Prophet , peace be upon him, said,

“O Allah! Bestow on Medina twice the blessings You bestowed on Mecca.”

The Prophet , peace be upon him, said,

“There is a garden from the gardens of Paradise between my house and my pulpit, and my pulpit is on my Lake Fount (Al-Kauthar).”

Umar ,radhi Allaahu anhu,said,

“O Allah! Grant me martyrdom in Your cause, and let my death be in the city of Your Apostle.”