Sahih Bukhari
Sahih Bukhari Volume 003, Book 030, Hadith Number 100.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 30. Virtues Of Madina
Narated By 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)."