Sunan an-Nasa'i 1992
سنن النسائي#1992SahihIt was narrated from 'Aishah that the Prophet said:"No Muslim dies and a group of people whose number reaches one hundred offers the funeral prayer for him, interceding fro him, but their intercession for him will be accepted
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 21:175