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 Old English scribes and christened to become the word "bless". Similarly "fullwiht" (literally, "full-being") and the verb "fullian" came to mean "baptism" and "to baptize" respectively, but probably originally referred to some kind of rite of passage. Whenever a suitable Old English substitute could not be found, a Latin word could be chosen instead, and many Latin words entered the Old English lexicon in this way. Such words include: "biscop" "bishop" from Latin "episcopus", Old English "teped" "carpet" from Latin "tapetum", and Old English "sigel" "brooch" from Latin "sigillum". Other words came in, even though an adequate Old English term