Oooo! I like that expression.
My dad always used to say to me and my sister: "duermas con los angeles." (meaning sleep with the angels...this way we felt safe, and knew Jehovah was looking over us.)
SIDENOTE: it wouldn't translate on "freetranslation.com", so I'm glad you included the meaning.
i may have spelled some of the words wrong also, remember we use the "slang" here.
ah, entiendo