Rest assured / Be rest assured

(which is correct? See more…)

“Be rest assured” is not standard usage among native speakers of English. Unfortunately, that is the popular Nigerian English.

Many authorities throw their weights behind ‘rest assured,’ and describe it as the correct option. It is a fixed phrase or expression that is used to reassure somebody about something; it also means certainty, guarantee, etc. A simple way to look at it is to say:

‘You rest (your mind) with the assurance that things will be fine.’ Hence ‘rest assured.’