The Prophet (ﷺ) 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 (ﷺ) ordered the graves of the pagans to be dug out and the land to be leveled, and the date-palm trees to be cut down. The cut datepalms were fixed in the direction of the Qibla of the mosque.
Sahih al-Bukhari Book 29, Hadith 2
← Previous Hadith The Prophet (ﷺ) 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).

Sahih al-Bukhari Book 29, Hadith 1 Next Hadith → The Prophet (ﷺ) said, "I have made Medina a sanctuary between its two (Harrat) mountains." The Prophet (ﷺ) 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."

Sahih al-Bukhari Book 29, Hadith 3