It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: A time will certainly come when a rider will be traveling on one side of the valley of Madinah and will say, "There used to be many believers living here."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14736
Hadith Gradingحکم دارالسلام:حديث حسن، وهذا إسناد ضعيف لضعف ابن لهيعة