Reliance on the Book and the Sunnah - Section 1 Mishkat al-Masabih 160
Arabic hadith text
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّ الْإِيمَانَ لَيَأْرِزُ إِلَى الْمَدِينَةِ كَمَا تأرز الحيية إِلَى جحرها»
Translation
He also reported God’s messenger as saying, “Faith will shrink back to Medina as a snake shrinks back to its hole.”(Bukhari and Muslim.)