Imam ALI(ASWS) said:
This Ummah will be separated in 73 sects of which 72 sects will go to Hell and 1 sect will go to Heaven. This will be the sect which follows the Wasi of Prophet MOHAMMAD i.e. HAZRAT ALI(ASWS).
Then Imam ALI(ASWS) said: From the 73 sects, 13 sects will claim that they love Me (Imam ALI(ASWS)). Out of these 13 sects, 1 sect will go to heaven and will be successful as they had acquired the middle path and 12 sects will go to Hell.
Source: Ehtejaje Tabrisi, Page 311