Have a good rest and don't worry about your work.

好好休息，别牵挂工作。

《新英汉大辞典》

Have a good rest and you will pick up soon.

好好休息一下，你很快就会康复的。

youdao

Have a good rest and you will feel energetic again.

好好休息一下，你就会有精神了。

youdao

It makes me feel really good and I have a lot of more energy for the rest of the day.

它真的让我感觉很好，我整天都会精力倍加充沛。

在空闲时间 - SpeakingMax英语口语达人

"Good night, and have a good rest, " he said before going back into the palace.

NPR: Argentine Jorge Bergoglio Elected Pope Francis

He now plans to "put the hammock up and have a good long rest".

BBC: Westonbury house-sized cuckoo clock unveiled

That said, people who live like that, who are naturally safety conscious, do that all the time, and have a good time the rest of the time.

CNN: Kate Kelly: Halloween safety