Read Ruth 4:7 Using Other Translations
Now this was the manner in former time in Israel concerning redeeming and concerning changing, for to confirm all things; a man plucked off his shoe, and gave it to his neighbour: and this was a testimony in Israel.
Now this was the custom in former times in Israel concerning redeeming and exchanging: to confirm a transaction, the one drew off his sandal and gave it to the other, and this was the manner of attesting in Israel.
Now in those days it was the custom in Israel for anyone transferring a right of purchase to remove his sandal and hand it to the other party. This publicly validated the transaction.