rest assured.

listen to the pronunciation of rest assured.
Английский Язык - Турецкий язык
emin olmak
için rahat olsun
Английский Язык - Английский Язык
Be sure; no need to worry; trust

You may rest assured that our best efforts will be put forth to give you entire satisfaction.

be calmed, be certain, no need to worry, go on being sure