In Catholicism, the prayer is a plea to God to shorten the suffering of souls in Purgatory and hasten their entry into Heaven.
"Eternal rest grant unto him/her/them, O Lord, and let perpetual light shine upon him/her/them. May he/she/they rest in eternal peace. Amen." Spiritual Meaning and Origins wieczny_odpoczynek
The standard form of the prayer used in liturgical and private devotions is: In Catholicism, the prayer is a plea to
It is recited by mourners at the graveside immediately before and after burial. wieczny_odpoczynek