Final answer:
Nia expressed her intention to sleep undisturbed and asked not to be woken for dinner, highlighting a need for rest and solitude.
Step-by-step explanation:
The passage that directly answers what Nia said when she was lying down on Muqtada's bed is: "But I am here, and no person touches this paper but me-not alive! She tried to get me out of the room-it was too patent!
But I said it was so quiet and empty and clean now that I believed I would lie down again and sleep all I could; and not to wake me even for dinner-I would call when I woke."
This excerpt suggests that Nia intends to sleep for as long as she needs, asking not to be disturbed even for dinner, emphasizing the need for rest and solitude.