He went back to bed but didn't sleep for a long time.

I want you to sleep for a few hours first.

Mother hadn't let him sleep with her for some time.

He might even have gone back to sleep for a little while.

She did not sleep for the rest of the night.

He was ready to fall into his bed and sleep for hours.

What he wanted more than anything was to sleep for a little while.

I needed to find a place to sleep for the night.

Then the very old people go back to sleep for another year.

He did not sleep for more than two to three hours.