The phrase’s enduring popularity is largely due to its inclusion in a classic English-language nursery rhyme. The most common version goes:
A popular educational podcast designed to help children (and adults) drift off to sleep while learning. Sleep Tight
The stars are shining, the moon is bright The world outside is quiet tonight So rest your head, and drift away May your slumber be peaceful, every day The phrase’s enduring popularity is largely due to
The phrase "sleep tight" implies an action. You are actively pulling the ropes taut. You must apply the same active approach to your pre-sleep routine. Sleep Tight