spać spokojnie

I could have been sleeping peacefully here upon the table.

The old man now looked as if he were sleeping peacefully.

If there wasn't any sign of anyone, then she could go back to bed and sleep peacefully.

"Thinking about the little boys, I had better go back now and make sure they are sleeping peacefully in my bed."

He looked down at her, sleeping so peacefully in his arms.

The baby took the food, and two hours later it was sleeping peacefully once more.

All of these children, sleeping so peacefully; everything must be okay.

With one final look at him sleeping peacefully on the bed, she opened the door and left his room.

For a long time after that he was unable to sleep peacefully.

I have to say that these are questions which do not let you sleep peacefully.