Ruth 3:3-4

3Wash yourself therefore, and anoint yourself, and put on your best clothes, and go down to the threshing floor; but do not reveal yourself to the man until he has finished eating and drinking.

4And it shall be when he lies down, that you shall 1take 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.”