The Prophet (peace and blessings be upon him) said:
"Whichever deceased person has the funeral prayer offered over him by a congregation of people, their intercession for him is accepted."
Hadith Referenceصحیح الجامع الصغیر / حرف الميم / 5787
Hadith Gradingالألبانی:حسن
Hadith Takhrij[ن] عن ميمونة. أحكام الجنائز ٩٩، الصحيحة ١٢٦٣.