'Transaction' in the Bible

(Now this used to be the customary way to finalize a transaction involving redemption in Israel: A man would remove his sandal and give it to the other party. This was a legally binding act in Israel.)

The city is sure to fall into the hands of the Babylonians. Yet, in spite of this, you, Lord God, have said to me, "Buy that field with silver and have the transaction legally witnessed."'"