Bible Verses About Altars: Natural rocks sometimes used as

So Gedeon went in, and boiled a kid, and made unleavened loaves of a measure of flour: and putting the flesh in a basket, and the broth of the flesh into a pot, he carried all under the oak, and presented to him.

And the angel of the Lord said to him: Take the flesh and the unleavened loaves, and lay them upon that rock, and pour out the broth thereon. And when he had done so,

The angel of the Lord put forth the tip of the rod, which he held in his hand, and touched the flesh and the unleavened loaves: and there arose a fire from the rock, and consumed the flesh and the unleavened loaves: and the angel of the Lord vanished out of his sight.

Then Manue took a kid of the flocks, and the libations, and put them upon a rock, offering to the Lord, who doth wonderful things: and he and his wife looked on.

And when the flame from the altar went up towards heaven, the angel of the Lord ascended also in the same. And when Manue and his wife saw this, they fell flat on the ground;