Ruth 4:7-10

7 aNow 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. 8So when the redeemer said to Boaz, “Buy it for yourself,” he drew off his sandal. 9Then Boaz said to the elders and all the people, “You are witnesses this day that I have bought from the hand of Naomi all that belonged to Elimelech and all that belonged to bChilion and to Mahlon. 10Also Ruth the Moabite, the widow of Mahlon, I have bought to be my wife, cto perpetuate the name of the dead in his inheritance, that the name of the dead may not be cut off from among his brothers and from the gate of his native place. You are witnesses this day.”

2 Samuel 24:24

24But the king said to Araunah, “No, but I will buy it from you for a price. I will not offer burnt offerings to the Lord my God that cost me nothing.” So David bought the threshing floor and the oxen for fifty shekels
A  shekel was about 2/5 ounce or 11 grams
of silver.

Jeremiah 32:10-11

10 eI signed the deed, fsealed it, ggot witnesses, and hweighed the money on scales. 11Then I took the sealed deed of purchase, containing the terms and conditions and the open copy.
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