set (one's) mind at ease

set (one's) mind at ease

To assuage or relieve one's worry, anxiety, dread, fear, etc. I know you're anxious to hear how your father is doing after the surgery, so let me set your mind at ease. He's going to make a full recovery. That bonus really set my mind at ease about these debts.
See also: ease, mind, set
Farlex Dictionary of Idioms.

set someone's mind at ease (about someone or something)

to make someone feel mentally comfortable about someone or something. Alice is upset. I will have to do something to set her mind at ease about the accident. Please set your mind at ease. Everything will be all right.
See also: ease, mind, set
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • set (one's) mind at rest
  • set (one's) mind to rest
  • set mind at ease
  • set one's mind at rest
  • put (one's) mind to rest
  • put/set somebody's mind at ease/rest
  • put (one's) mind at ease
  • put (one's) mind at rest
  • have goose bumps
  • goose bumps