2 Samuel 24:24

Overview - 2 Samuel 24
1	David, tempted by Satan, forces Joab to number the people.
5	The captains, in nine months and twenty days, bring the muster of thirteen hundred thousand fighting men.
10	David repents, and having three plagues propounded by God, chooses the three days' pestilence.
15	After the death of three score and ten thousand, David by prayer prevents the destruction of Jerusalem.
18	David, by God's direction, purchases Araunah's threshing floor; where having sacrificed, the plague stays.

2 Samuel 24:24  (King James Version)
And the king said unto Araunah, Nay; but I will surely buy it of thee at a price: neither will I offer burnt offerings unto the LORD my God of that which doth cost me nothing. So David bought the threshingfloor and the oxen for fifty shekels of silver.