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I pray for you to have peace of mind.
I pray for you to have a peace of mind.

Please advise which sentence is correct and why. Thank you in advance.
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I pray for you to have peace of mind. This is the correct expression. Peace is a non-count noun.

I pray for you to have a peace of mind. - It might be confused with a piece of my mind, which has an entirely different meaning!
Comments  
Thanks, AlpheccaStars, for the answer.
AlpheccaStarsI pray for you to have a peace of mind. - It might be confused with a piece of my mind, which has an entirely different meaning!
I didn't realize that. I might be misunderstood that I thought the person has no brain/mind. Sorry about that.Emotion: it wasnt me