After burying the deceased1 du'a

O Allah, forgive him. O Allah, strengthen him.

Reference:The Prophet (ﷺ) used to stop after burying the dead and say to the people: "Ask Allah to forgive your brother and pray for him to be strengthened, for indeed he is now being questioned." Abu Dawud 3/315, and Al-Hakim 1/370 who graded it authentic and Ath-Thahabi agreed.Hisnul Muslim 164

اللَّهُمَّ اغْفِرْ لَهُ اللَّهُمَّ ثَبِّتْهُ

Transliteration

Allāhumma’ghfir lahAllāhumma thabbit’h.

Translation

O Allah, forgive him. O Allah, strengthen him.