repose in something
1. to lie stretched out in something, such as a bed. I think I would like to repose in my own bed for an hour or two before I begin my journey. Tom reposed in a comfortable chair for the rest of the evening.
2. to lie stretched out in a particular state, such as death or slumber. She lay on the cot, reposed in slumber, waiting for Prince Charming to arrive. The ruler reposed in death on public view for two days.
3. [for something] to exist in something or be part of the essence of something. Much of our cultural heritage reposes in our literature. Considerable important thinking reposes in folktales and myths.
repose (up)on something
to lie on something. (Upon is formal and less commonly used than on.) I will repose upon these cushions until my bathwater has been drawn. Dawn reposed on the sofa for over an hour.