2 Samuel 24:24-25

Revised Standard Version

²⁴ But the king said to Arau′nah, “No, but I will buy it of you for a price; I will not offer burnt offerings to the Lord my God which cost me nothing.” So David bought the threshing floor and the oxen for fifty shekels of silver. ²⁵ And David built there an altar to the Lord, and offered burnt offerings and peace offerings. So the Lord heeded supplications for the land, and the plague was averted from Israel.