"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."
Sunan an-Nasa'i Book 21, Hadith 175
← Previous Hadith "There is no deceased person for whom a group of Muslims whose number reaches one hundred, offers the funeral prayer, interceding for him; but their intercession for him will be accepted." (One of the narrators) Sallam said: "I narrated it to Shu'aib bin Al-Habhab and he said: 'Anas bin Malik narrated it to me from the Prophet.'"

Sunan an-Nasa'i Book 21, Hadith 174 Next Hadith → "Abu Al-Malih led us in offering the funeral prayer and we thought that he had said the Takbir, but he turned to us and said: 'Make you rows straight and intercede properly.' Abu Al-Malih said: Abdullah - meaning Ibn Salit-narrated to me that one of the Mothers of the believes, Maimunah the wife of the Prophet, said: The Prophet told me: There is no deceased person for whom a group of people offers the funeral prayer, but their intercession for him will be accepted.' I asked Abu Al-Malih about the (number of that) group and he said: 'Forty."'

Sunan an-Nasa'i Book 21, Hadith 176