"Rest in peace" (Latin: Requiescat in pace) is a short epitaph or idiomatic expression wishing eternal rest and peace to someone who has died. The expression typically appears on headstones, often abbreviated as "RIP".

The phrase or initialism is commonly found on the grave of Catholics, as it is derived from the burial service of the Catholic Church, in which the following prayer is said at its commencement and conclusion:

In English:

Outside a burial service, Catholics ordinarily recite it as a short prayer:

An English version:

To satisfy a vogue for rhyming couplets on tombstones, the phrase has been parsed as:

Originally in Hebrew in Isaiah (57, 2):

The verse from Isaiah has been found inscribed in Hebrew on gravestones dating from the 1st century BC, in the graveyard of Bet Shearim. This verse speaks of the righteous person who died because he could not stand the evil surrounding him. A recapture of these words, read as "come and rest in peace," has been transferred to the ancient Talmudic prayers, in a mixture of Hebrew and Aramaic of the 3rd century AD. It is used to this day in traditional Jewish ceremonies.

Mark William Calaway (born March 24, 1965) is an American professional wrestler better known by his ring name The Undertaker. He is signed to WWE and is the company's most tenured competitor. Calaway began his wrestling career with World Class Championship Wrestling (WCCW) in 1984. He joined World Championship Wrestling (WCW) as "Mean" Mark Callous in 1989. When WCW did not renew Calaway's contract in 1990, he signed with the World Wrestling Federation in October and, after shortening his name from Kane the Undertaker to simply The Undertaker, has remained with the company since.

The Undertaker has two contrasting personas. The first is the role of The Deadman, an undead, occult-like figure, which has consisted of many different styles. He debuted his original Deadman persona during his own on-camera debut at Survivor Series (1990). At this event, the Undertaker was clad as a Western mortician. Next, in October of 1998, the Undertaker appeared as the leader of the Ministry of Darkness (with similar apparel). Since WrestleMania XX, the Undertaker has appeared as a hybrid version of the Deadman character, using elements of the previous Deadman incarnations.