What is the origin of the phrase rest in peace?

The phrase 'Rest in Peace' is generally understood as a wish for eternal peace for the soul of the departed. Found in the form of RIP on tombstones, it comes from a Latin prayer within the Roman Catholic burial liturgy. Its origins are found in Hebrew in the Old Testament of the Holy Bible in the Book of Isaiah chapter 57 verse 2: " Those who walk uprightly enter peace; they find rest as they lie in death."

It part of the liturgy of burial in the Catholic Church. requiescant in pace (rest in peace)

thank you Ramos -- I just found it interesting that a thread was begun by someone who has expressed a disbelief in God using this term.

I think I missed something Dennisrn. If you're refering to the god vs no god thread I havent paid much attention to it. THere is no way to prove or disprove the existance of a god.
Even tho I'm geting close to the end of days I don't see any solution to the arguments and will go wondering what'll I'll see or not see on the other side.

Ramos, he was definitely referring to this thread.

http://eccie.net/showthread.php?t=381382

The title has R.I.P. in it.

Ah yes, now I see. Thank you! Yes, a bit peculiar. But what's an atheist to do?