كتاب السنة
Read the English translation first, with the original Arabic directly underneath.
Narrated AbuHurayrah:
The Prophet (ﷺ) said: The Jews were split up into seventy-one or seventy-two sects; and the Christians were split up into seventy one or seventy-two sects; and my community will be split up into seventy-three sects.
افْتَرَقَتِ الْيَهُودُ عَلَى إِحْدَى أَوْ ثِنْتَيْنِ وَسَبْعِينَ فِرْقَةً وَتَفَرَّقَتِ النَّصَارَى عَلَى إِحْدَى أَوْ ثِنْتَيْنِ وَسَبْعِينَ فِرْقَةً وَتَفْتَرِقُ أُمَّتِي عَلَى ثَلاَثٍ وَسَبْعِينَ فِرْقَةً