Hadith on 'Virtues of Madinah' of Sahih Bukhari.

Narrated Anas: The Prophet said, "Medina is a sanctuary from that place to that. Its trees should not be cut and no heresy should be innovated nor any sin should be committed in it, and whoever innovates in it an heresy or commits sins (bad deeds), then he will incur the curse of Allah, the angels, and all the people." (See Hadith No. 409, Vol 9). 

Narrated Anas: The Prophet came to Medina and ordered a mosque to be built and said, "O Bani Najjar! Suggest to me the price (of your land)." They said, "We do not want its price except from Allah" (i.e. they wished for a reward from Allah for giving up their land freely). So, the Prophet ordered the graves of the pagans to be dug out and the land to be levelled, and the date-palm trees to be cut down. The cut date-palms were fixed in the direction of the Qibla of the mosque.  

Narrated Abu Huraira: The Prophet said, "I have made Medina a sanctuary between its two (Harrat) mountains." The Prophet went to the tribe of Bani Haritha and said (to them), "I see that you have gone out of the sanctuary," but looking around, he added, "No, you are inside the sanctuary."  

Narrated 'Ali: We have nothing except the Book of Allah and this written paper from the Prophet (where-in is written:) Medina is a sanctuary from the 'Air Mountain to such and such a place, and 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. And the asylum (of protection) granted by any Muslim is to be secured (respected) by all the other Muslims; and whoever betrays a Muslim in this respect incurs the curse of Allah, the angels, and all the people, and none of his compulsory or optional good deeds of worship will be accepted, and whoever (freed slave) befriends (take as masters) other than his manumitters without their permission incurs the curse of Allah, the angels, and all the people, and none of his compulsory or optional good deeds of worship will be accepted.  

Narrated Abu Huraira: Allah's Apostle said, "I was ordered to migrate to a town which will swallow (conquer) other towns and is called Yathrib and that is Medina, and it turns out (bad) persons as a furnace removes the impurities of iron.  

Narrated Abu Humaid: We came with the Prophet from Tabuk, and when we reached near Medina, the Prophet said, "This is Tabah."  

Narrated Abu Huraira: If I saw deers grazing in Medina, I would not chase them, for Allah's Apostle said, "(Medina) is a sanctuary between its two mountains." 

Narrated Abu Huraira: I heard Allah's Apostle saying, "The people will leave Medina in spite of the best state it will have, and none except the wild birds and the beasts of prey will live in it, and the last persons who will die will be two shepherds from the tribe of Muzaina, who will be driving their sheep towards Medina, but will find nobody in it, and when they reach the valley of Thaniyat-al-Wada', they will fall down on their faces dead."  

Narrated Abu Zuhair: I heard Allah's Apostle saying, "Yemen will be conquered and some people will migrate (from Medina) and will urge their families, and those who will obey them to migrate (to Yemen) although Medina will be better for them; if they but knew. Sham will also be conquered and some people will migrate (from Medina) and will urge their families and those who will obey them, to migrate (to Sham) although Medina will be better for them; if they but knew. 'Iraq will be conquered and some people will migrate (from Medina) and will urge their families and those who will obey them to migrate (to 'Iraq) although Medina will be better for them; if they but knew."  

Narrated Abu Huraira: Allah's Apostle said, "Verily, Belief returns and goes back to Medina as a snake returns and goes back to its hole (when in danger)."