2 Samuel 24:22-24

And Araunah said unto David, Let my lord the king take and offer up what seemeth good unto him: behold, the oxen for the burnt-offering, and the threshing instruments and the yokes of the oxen for the wood: all this, O king, doth Araunah give unto the king. And Araunah said unto the king, Jehovah thy God accept thee. And the king said unto Araunah, Nay; but I will verily buy it of thee at a price; neither will I offer burnt-offerings unto Jehovah my God which cost me nothing. So David bought the threshing-floor and the oxen for fifty shekels of silver.