Ibrahim declared Mecca as sacred; I declare Medina, that between the two mountains, as inviolable. No tree should be lopped and no game is to be molested.
Sahih Muslim Book 15, Hadith 521
← Previous Hadith What is this that I hear you making mention of Mecca and its inhabitants and its sacredness, but you did not make mention of Medina and its inhabitants and its sacredness, while the Messenger of Allah (ﷺ) has also declared sacred (the area) between its two lava lands (Medina)? And (we have record of this) with us written on Khaulani parchment. If you like, I can read it out to you. Thereupon Marwan became silent, and then Said: I too have heard some part of it.

Sahih Muslim Book 15, Hadith 520 Next Hadith → I have declared sacred the territory between the two lava plains of Medina, so its trees should not be cut down, or its game killed; and he also said: Medina is best for them if they knew. No one leaves it through dislike of it without Allah putting in it someone better than he in place of him; and no one will stay there in spite of its hardships and distress without my being an intercessor or witness on behalf of him on the Day of Resurrection.

Sahih Muslim Book 15, Hadith 522