Ruth 3:4

3:4 When he gets ready to go to sleep, take careful notice of the place where he lies down. Then go, uncover his legs, and lie down beside him. He will tell you what you should do.”

Ruth 4:5

4:5 Then Boaz said, “When you acquire the field from Naomi, you must also acquire Ruth the Moabite, the wife of our deceased relative, in order to preserve his family name by raising up a descendant who will inherit his property.”

Ruth 4:7

4:7 (Now this used to be the customary way to finalize a transaction involving redemption in Israel: A man would remove his sandal and give it to the other party. This was a legally binding act in Israel.)