Ruth 3:4-8

And it shall be when he lies down, that you shall take notice of the place where he lies, and you shall go and uncover his feet and lie down; then he will tell you what you should do.”

And she said to her, “All that you say I will do.”

So she went down to the threshing floor and did according to all that her mother-in-law had commanded her.

When Boaz had eaten and drunk and his heart was cheerful, he went to lie down at the end of the heap of grain; and she came secretly, and uncovered his feet and lay down.

And it happened in the middle of the night that the man was startled and bent forward; and behold, a woman was lying at his feet.