1 Chronicles 21:24-27

But King David replied to Araunah, “No, I insist on buying it for the full price. I will not take what is yours and give it to the LORD. I will not present burnt offerings that have cost me nothing!” So David gave Araunah 600 pieces of gold in payment for the threshing floor. David built an altar there to the LORD and sacrificed burnt offerings and peace offerings. And when David prayed, the LORD answered him by sending fire from heaven to burn up the offering on the altar. Then the LORD spoke to the angel, who put the sword back into its sheath.