كتاب الطهارة
Read the English translation first, with the original Arabic directly underneath.
'Awf bin Malik said:
"I heard the Messenger of Allah (ﷺ) offering the (funeral) prayer for one who had died, and I heard him say in his supplication: 'Allahummaghfir lahu warhamhu wa 'afihi was a'fu 'anhu, wa akrim nuzulahu wa wassi' ,adkhalahu waghsilhu bil-ma'i wath-thalji wal-baradi wa naqqihi min al-khataya kama ynaqqath-thawb al-abyad min ad-danas. (O Allah, forgive him and have mercy on him, keep him safe and sound and forgive him, honor the place where he settles and make his entrance wide; wash him with water and snow and hail, and cleanse him of sin as a white garment is cleansed of dirt)."
اللَّهُمَّ اغْفِرْ لَهُ وَارْحَمْهُ وَعَافِهِ وَاعْفُ عَنْهُ وَأَكْرِمْ نُزُلَهُ وَأَوْسِعْ مُدْخَلَهُ وَاغْسِلْهُ بِالْمَاءِ وَالثَّلْجِ وَالْبَرَدِ وَنَقِّهِ مِنَ الْخَطَايَا كَمَا يُنَقَّى الثَّوْبُ الأَبْيَضُ مِنَ الدَّنَسِ