It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The Jews were divided into seventy-one or seventy-two sects, and my Ummah will be divided into seventy-three sects.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8396