It wasnarrated from Abu Hurairah that the Prophet (ﷺ) said:
"Whoeverhas the funeral prayer offered for him by one hundredMuslims, hewill be forgiven." (JA)
English reference (JA): Vol. 1, Book 6, Hadith 1488 (JA)
Arabic reference (JA): Book 6, Hadith 1555 (JA)