The Wizard of Oz by Lynam Frank Baum Chapter 8 Page 12

But Dorothy did not know this, nor could she get away from the bright red flowers that were everywhere about; so presently her eyes grew heavy and she felt she must sit down to rest and to sleep.

But the Tin Woodman would not let her do this.

“We must hurry and get back to the road of yellow brick before dark,” he said; and the Scarecrow agreed with him. So they kept walking until Dorothy could stand no longer. Her eyes closed in spite of herself and she forgot where she was and fell among the poppies, fast asleep.

“What shall we do?” asked the Tin Woodman.

“If we leave her here she will die,” said the Lion. “The smell of the flowers is killing us all. I myself can scarcely keep my eyes open, and the dog is asleep already.”