It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings be upon him) said: Before the Day of Judgment, about thirty Dajjal and great liars will appear, each of whom will think that he is a messenger of Allah.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 9548
Hadith Gradingحکم دارالسلام:حدیث صحیح ، خ : 3609 ، م : 157 ، وھذا إسناد منقطع ، خلاس لم یسمع من أبي ھریرۃ