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.
Lest we forget (phrase) 4:7-9): This Biblical quote is probably a direct source for the term in the 1897 poem. This is consistent with the main theme of the "Recessional" poem – that if a nation forgets the true source of its success (the "Lord God of Hosts" and His "ancient sacrifice" of "a humble and contrite heart") – its military or material possessions will be insufficient in times of war. The poem "Recessional" also appears as a common hymn at war remembrance services; and the phrase "Lest We Forget" can hence be sung. The phrase later passed into common usage after World War