Bible Verses About Altars: Natural rocks sometimes used as

So Gideon went in and prepared a young goat and unleavened bread and an ephah of flour. He placed the meat in a basket and the broth in a pot and brought them out to present to Him under the oak.

And the angel of God said to him, “Take the meat and the unleavened bread, lay them on this rock, and pour out the broth.” And Gideon did so.

Then the angel of the LORD extended the tip of the staff that was in his hand and touched the meat and the unleavened bread. And fire flared from the rock and consumed the meat and the unleavened bread. Then the angel of the LORD vanished from his sight.

Then Manoah took a young goat and a grain offering and offered them on a rock to the LORD. And as Manoah and his wife looked on, the LORD did a marvelous thing.

When the flame went up from the altar to the sky, the angel of the LORD ascended in the flame. When Manoah and his wife saw this, they fell facedown to the ground.