1 Chronicles 21:24-27

But 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.” So David paid Ornan 600 shekels of gold by weight for the site. And 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. Then the LORD commanded the angel, and he put his sword back into its sheath.