Mishkat al-Masabih 5602

"Indeed in my Ummah are those who intercede for large groups of people, and among them (there are) who intercede for a tribe, and among them (there are) who intercede for a group, and among them (there are) who intercede for a man, until they are admitted to Paradise."

"‏ إِنَّ مِنْ أُمَّتِي مَنْ يَشْفَعُ لِلْفِئَامِ وَمِنْهُمْ مَنْ يَشْفَعُ لِلْقَبِيلَةِ وَمِنْهُمْ مَنْ يَشْفَعُ لِلْعُصْبَةِ وَمِنْهُمْ مَنْ يَشْفَعُ لِلرَّجُلِ حَتَّى يَدْخُلُوا الْجَنَّةَ ‏"

Narrated by Abu Sa‘īd al-Khudri