Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:22149a
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السيوطي:٢٢١٤٩a

"مَنْ صَلَّى عَلَيهِ مِائَةٌ مِنَ الْمُسْلِميِنَ غُفِرَ لَهُ".  

[هـ] ابن ماجة [هب] البيهقى في شعب الإيمان [كر] ابن عساكر في تاريخه عن أَبي هريرة

See similar narrations below:

Collected by Ibn Mājah, Suyūṭī
ibnmajah:1488Abū Bakr b. Abū Shaybah > ʿUbaydullāh > Shaybān > al-Aʿmash > Abū Ṣāliḥ > Abū Hurayrah

“Whoever has the funeral prayer offered for him by one hundred Muslims, he will be forgiven.”  

ابن ماجة:١٤٨٨حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا عُبَيْدُ اللَّهِ أَنْبَأَنَا شَيْبَانُ عَنِ الأَعْمَشِ عَنْ أَبِي صَالِحٍ عَنْ أَبِي هُرَيْرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ صَلَّى عَلَيْهِ مِائَةٌ مِنَ الْمُسْلِمِينَ غُفِرَ لَهُ