motionless (part of speech: adjective)
resting (part of speech: verb)
- The door into Gertrude's room was no longer locked: she was sleeping like a tired child. - "The Circular Staircase", Mary Roberts Rinehart.
- So the sleeping child was brought and placed in her mother's arms. - "The Sleeping Beauty", C. S. Evans.
- Still he was sleeping; and, as Craggs whispered, he seldom slept otherwise, even when in health. - "The Fortunes Of Glencore", Charles James Lever.