It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that I heard the Prophet (peace and blessings be upon him) say: "The worst of people will be those who are alive at the time of the Hour, or those who make graveyards a place of prostration."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 4143
Hadith Gradingحکم دارالسلام:إسناده حسن من أجل عاصم.