Here are some common idioms related to sleep that might be similar:
* "Early to bed and early to rise makes a man healthy, wealthy, and wise." This proverb means that getting enough sleep and waking up early is beneficial.
* "Hit the hay" This is a casual way of saying "go to bed."
* "Sleep like a log" This means to sleep soundly.
Perhaps you're thinking of a different idiom or phrase entirely. If you can provide more context, I might be able to help you find the right one!