It is narrated from Hazrat Abu Saeed (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: My ummah will be divided into two groups, and from among them a group will emerge, which will be killed by the faction that is closer to the truth among those two groups.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 11416