Goodnight, sleep tight!

晚安，睡个好觉！

《牛津词典》

You are welcome, sweetie. Sleep tight and have a sweet dream.

不客气的，宝贝。睡个好觉，做个好梦。

youdao

Good night, sleep tight!

晚安，睡个好觉！兟。

youdao

And,if you wish someone good night, you might say, "sleep tight -- don't let the bed bugs bite."

VOA: special.2009.06.28

Sleep tight Rosie Mc x.

BBC: Coleen Rooney's sister Rosie dies

I'm the single mother who has been trying to teach her child to sleep in their own bed, who holds them tight long into the night, thanking God it wasn't her child that died.

BBC: What's your favourite poem?