Rest in peace (acronym R.I.P.) in the second person singular, or “Requiescite in pace” in the second person plural. In the common phrase "Requiescat in pace" the "-at" ending is appropriate because the verb is a third-person singular present active subjunctive used in a hortative sense: "May he/she rest in peace." The phrase was first found on tombstones some time before the fifth century. It became ubiquitous on the tombs of Christians in the 18th century, and for High Church Anglicans, Methodists, as well as Roman Catholics in particular, it was a prayerful request that their soul should find peace in the afterlife.
Latin influence in English tribes, who would later give rise to the English language (the Angles, Saxon and Jutes) traded and fought with the Latin speaking Roman Empire. Many words (some originally from Greek) for common objects therefore entered the vocabulary of these Germanic people via Latin even before the tribes reached Britain (what is known as the Continental or Zero Period): "anchor", "butter", "camp", "cheese", "chest", "cook", "copper", "devil", "dish", "fork", "gem", "inch", "kitchen", "mile", "mill", "mint" (coin), "noon", "pillow", "pound" (unit of weight), "punt" (boat), "sack", "street", "wall", "wine". Cognates of virtually all of these English words exist in the other Germanic