Ruth 4:7-9

(At that time in Israel, in order to finalize a transaction concerning redeeming and transferring property, a man would customarily remove a sandal and give it to the other party, making the contract legally binding.) So when the kinsman-redeemer said to Boaz, “Take my purchase option of redemption for yourself,” he took off his sandal and gave it to Boaz. Then Boaz turned to the elders and announced publicly, “Today, you are witnesses that I have purchased from the hand of Naomi all that belonged to Elimelech and all that belonged to Chilion and Mahlon.