Ruth 4:8

The near kinsman said, "I can't redeem it for myself, lest I mar my own inheritance. Take my right of redemption for yourself; for I can't redeem it.

Now this was [the custom] in former time in Israel concerning redeeming and concerning exchanging, to confirm all things: a man took off his shoe, and gave it to his neighbor; and this was the [way of] attestation in Israel.

Boaz said to the elders, and to all the people, "You are witnesses this day, that I have bought all that was Elimelech's, and all that was Chilion's and Mahlon's, from the hand of Naomi.

Moreover Ruth the Moabitess, the wife of Mahlon, I have purchased to be my wife, to raise up the name of the dead on his inheritance, that the name of the dead not be cut off from among his brothers, and from the gate of his place. You are witnesses this day.