WordNet
n. euphemisms for death (based on an analogy between lying in a bed and in a tomb); "she was laid to rest beside her husband"; "they had to put their family pet to sleep" [syn: rest, sleep, eternal sleep, quietus]
Wikipedia
Eternal Rest, or Requiem Æternam, is a Roman Catholic prayer asking God to hasten the progression of the souls of the faithful departed in Purgatory to their place in Heaven.
This doctrine is found in the Catechism of the Catholic Church, paragraphs 1030-1032:
Usage examples of "eternal rest".
The Romish mass for the dead begins with Requiem eternam (eternal rest), whence Requiem denominating the mass itself, and any other funereal music.
Finally, he makes an end of this work, having implored eternal rest from God.
I think his heart wasn't entirely in it anymore, now that he was eagerly looking forward to his eternal rest.
Darius had to attack anything threatening those under his protection, but some part of him was urging him to fight to the death, wanting to take the vampire with him to eternal rest.