O Allah, surely [name the person] is under Your protection, and in the rope of Your security, so sav...
Reference:Ibn Majah, Abu Dawud 3/211. See also Al Albani, Sahih Ibn Majah 1/251.Hisnul Muslim 158
اللهُـمِّ إِنَّ فُلانَ بْنَ فُلانٍ في ذِمَّـتِك وَحَبْـلِ جِـوارِك فَقِـهِ مِنْ فِتْـنَةِ الْقَـبْرِ وَعَذابِ النّـار وَأَنْتَ أَهْلُ الْوَفـاءِ وَالْـحَقِّ فَاغْفِـرْ لَهُ وَارْحَمْـهُ إِنَّكَ أَنْتَ الغَـفورُ الـرَّحيم
Allāhumma inna [name the person] fī dhimmatik. wa ḥabli jiwārik. faqihi min fitnati ‘l-qabri wa `adhābin-nār. wa anta ahlu ‘l-wafā'i wa ‘l-ḥaqq. Faghfir lahu warḥamhinnaka anta ‘l-Ghafūrur-Raḥīm.
O Allah, surely [name the person] is under Your protection, and in the rope of Your security, so save him from the trial of the grave and from the punishment of the Fire. You fulfill promises and grant rights, so forgive him and have mercy on him. Surely You are Most Forgiving, Most Merciful.