2 Samuel 24:24

24 However, the king said to Araunah, “No, but I will surely buy it from you for a price, for aI will not offer burnt offerings to Yahweh my God 1which cost me nothing.” So bDavid bought the threshing floor and the oxen for fifty 2shekels of silver.

a	Mal 1:13 Mal 1:14
1	Lit gratuitously
b	1 Ch 21:24 1 Ch 21:25
2	A shekel was approx. 0.4 oz. or 11 gm