Mythical character in European folklore who puts people to sleep
The Sandman is a mythical character in European folklore who puts people to sleep and encourages and inspires beautiful dreams by sprinkling magical sand onto their eyes. Representation in traditional folklore. The Sandman is a traditional character in many children's stories and books. In Scandinavian folklore, he is said to sprinkle sand or dust on or into the eyes of children at night to bring on sleep and dreams. The grit or "sleep" (rheum) in one's eyes upon waking is the supposed result of the Sandman's work the previous night. Literature. E. T. A.
https://en.wikipedia.org/wiki/Sandman