go to (one's) reward
euphemism To die. I was very sorry to hear that your grandfather went to his reward last night.
go to one's (just) reward
Euph. to die. Let us pray for our departed sister, who has gone to her just reward. Bill: How's your grandma these days? Tom: She went to her reward last winter, may she rest in peace.
go to your reward
die. This euphemisistic expression is based on the idea that people receive their just deserts after death.