Sahih Muslim | Book 7 | Hadith Number 3154

Narrated by Amir b. Sa'd
Amir b. Sa'd reported on the authority of his father (Allah be pleased with him) that Allah's Messenger (may peace be upon him) said: 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.