What dua to say for the dead?

Dua for the Deceased

When praying for the deceased, a commonly recited dua is:

"Allahumma ighfir lahu warhamhu wa 'afihi wa 'fu anhu." This translates to, "O Allah, forgive him, have mercy on him, grant him relief, and pardon him."

Additionally, you can say:

"Inna lillahi wa inna ilayhi raji’un." This is a reminder that indeed, we belong to Allah and to Him we shall return.