God rest his/her soul - Idioms by The Free Dictionary
God rest his/her soul
God rest his/her/their soul
May this person find peace in the afterlife. My dear father, God rest his soul, worked his whole life so that we would have the opportunities he never had growing up.
God ˌrest his/her ˈsoul,
God ˈrest him/her (old-fashioned, spoken) used to show respect when you are talking about somebody who is dead: My grandfather, God rest his soul, would never think of leaving the house without a suit and tie on.