Ruth 4:5-8

5Then Boaz said, “On the day you buy the land from Naomi and also from Ruth the Moabitess, you must also acquire the widow of the deceased in order to raise up the name of the deceased on his inheritance.”

6The kinsman-redeemer replied, “I cannot redeem it myself, or I would jeopardize my own inheritance. Take my right of redemption, because I cannot redeem it.”

7Now in former times in Israel, concerning the redemption or exchange of property, to make any matter legally binding a man would remove his sandal and give it to the other party, and this was a confirmation in Israel. 8So the kinsman-redeemer removed his sandal and said to Boaz, “Buy it for yourself.”