Joshua 5:15

15And the commander of the Lord’s army said to Joshua, a“Take off your sandals from your feet, for the place where you are standing is holy.” And Joshua did so.

Ruth 4:7

7 bNow 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.
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