Reference : Hisn al-Muslim 156
اللهُـمِّ اغْفِـرْ لَهُ وَارْحَمْـه ، 
وَعافِهِ وَاعْفُ عَنْـه ، 
وَأَكْـرِمْ نُزُلَـه ، 
وَوَسِّـعْ مُدْخَـلَه ، 
وَاغْسِلْـهُ بِالْمـاءِ وَالثَّـلْجِ وَالْبَـرَدْ ، 
وَنَقِّـهِ مِنَ الْخطـايا 
كَما نَـقّيْتَ الـثَّوْبَ الأَبْيَـضَ مِنَ الدَّنَـسْ ،
وَأَبْـدِلْهُ داراً خَـيْراً مِنْ دارِه ،
وَأَهْلاً خَـيْراً مِنْ أَهْلِـه ،
وَزَوْجَـاً خَـيْراً مِنْ زَوْجِه ،
وَأَدْخِـلْهُ الْجَـنَّة ،
وَأَعِـذْهُ مِنْ عَذابِ القَـبْر [وَعَذابِ النّـار]
Allāhumma’ghfir lahu warḥamh, 
wa `āfihi, wa`fu `anh, 
wa akrim nuzulah, 
wa wassi` mudkhalah, 
wagh’silhu bi ‘lmā'i wath-thalji walbarad, 
wa naqqihi mina ‘l-khaṭāyā
kamā naqqaytath-thawba ‘l-abyaḍa minad-danas, 
wa abdilhu dāran khayran min dārih, 
wa ahlan khayran min ahlih, 
wa zawjan khayran min zawjih, 
wa adkhilhu ‘l-jannah, 
wa a`idhhu min `adhābi ‘l-qabri [wa `adhābin-nār].


O Allah, forgive him and have mercy on him, 
and give him strength and pardon him. 
Be generous to him, 
and cause his entrance to be wide, 
and wash him with water and snow and hail. 
Cleanse him of his transgressions 
as white cloth is cleansed of stains. 
Give him an abode better than his home, 
and a family better than his family, 
and a wife better than his wife. 
Take him into Paradise, 
and protect him from the punishment of the grave [and from the punishment of Hell-fire].

Reference:
Muslim 2/663.

Chapter: For the deceased at the funeral prayer