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. My grandmother was only 59 when she passed, rest her soul.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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.
Farlex Partner Idioms Dictionary © Farlex 2017