2 Samuel 24:24-25

But the king answered Araunah, “No, I will pay you for the land. I won’t offer to the LORD my God burnt offerings that cost me nothing.” So David bought the threshing floor and the oxen for one and one-fourth pounds of silver. He built an altar to the LORD there and offered whole burnt offerings and fellowship offerings. Then the LORD answered his prayer for the country, and the disease in Israel stopped.