פּירוש אויף רות 4:8

“The redeemer said” [4:8]. The redeemer said to Boaz, buy it. Boaz took off his glove and bought Ruth for himself.

"And he drew off his shoe." Boaz drew off his own shoe and gave it to the kinsman. This action is what our sages of blessed memory referred to as "chalifin" (exchanging). The reason for this is that by accepting the shoe, you transfer your right of redemption. The significance of the shoe is that it is always worn, and it is not possible to remove a sandal or trousers without leaving oneself naked. Some say that the kinsman drew off his shoe and gave it to Boaz, and the reason is that by giving you this shoe, I am conveying to you the right of redemption.