Kohlar performing the Plea for the Dead (2377).
The Plea for the Dead is a Klingon prayer said at mid-day to honor the sacrifices of their ancestors. Accordingly, the dead can not rest in Sto-Vo-Kor if the living do not honor their memory.
As recited by Kohlar, the beginning of the prayer is:
Kahless, we implore you to remember those warriors who have fallen in your name. Lift them out of the cavern of despair and reveal Yourself to them in all Your glory.
The next lines would be personalized for the individual making the plea, asking Kahless to remember a family member and citing their parentage.
As a child, B'Elanna Torres said the prayer for her grandmother, L'Naan. (VOY: "Prophecy")