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.
Phrase contains. This means that some expressions that may be called phrases in everyday language are not phrases in the technical sense. For example, in the sentence "I can't put up with Alex", the words "put up with" (meaning 'tolerate') may be referred to in common language as a phrase (English expressions like this are frequently called phrasal verbs) but technically they do not form a complete phrase, since they do not include "Alex", which is the complement of the preposition "with". In grammatical analysis, most phrases contain a key word that identifies the type and linguistic features of the phrase;