اَللَّهُمَّ إِنَّ (فُلَانَةَ بِنْتُ فُلَانٍ) فِي ذِمَّتِكَ وَحَبْلِ جِوَارِكَ فَقِهِ مِنْ فِتْنَةِ الْقَبْرِ وَعَذَابِ النَّارِ وَأَنْتَ أَهْلُ الْوَفَاءِ وَالْحَقِّ، اَللَّهُمَّ فَاغْفِرْ لَهَا وَارْحَمْهَا إِنَّكَ أَنْتَ الْغَفُوْرُ الرَّحِيْمُ

Allaahumma 'inna (fulanata bintu fulan) fee dhimmatika, wa habli jiwaarika, faqihi min fitnatil-qabri wa 'adhaabin-naari, wa 'Anta 'ahlul-wafaa'i walhaqq. Allaahumma faghfir laha warhamha 'innaka 'Antal-Ghafoorur-Raheem

O Allah, surely [name the person] is under Your protection, and in the rope of Your security, so save her from the trial of the grave and from the punishment of the Fire. You fulfill promises and grant rights, so forgive her and have mercy on her. Surely You are Most Forgiving, Most Merciful.

Reference: Sahih. Abu Dawud: 3202