1 Chronicles 21:23-26

23Then Ornan said to David, "Take it, and let my lord the king do what seems good to him. See, I give the oxen for burnt offerings and the threshing sledges for the wood and the wheat for a grain offering; I give it all."

24But King David said to Ornan, "No, but I will buy them for the full price. I will not take for the Lord what is yours, nor offer burnt offerings that cost me nothing."

25So David paid Ornan 600 shekels of gold by weight for the site.

26And David built there an altar to the Lord and presented burnt offerings and peace offerings and called on the Lord, and the Lord answered him with fire from heaven upon the altar of burnt offering.