Thematic Bible: Natural rocks sometimes used as

So Gideon went into his house and cooked a young goat and used a bushel of flour to make bread without any yeast. He put the meat in a basket and the broth in a pot, brought them to Jehovah's angel under the oak tree, and gave them to him. The angel told him: Put the meat and the bread on this rock, and pour the broth over them. Gideon did so. Jehovah's angel reached out and touched the meat and the bread with the end of the stick he was holding. Fire came out of the rock and burned up the meat and the bread. Then the angel disappeared.

So Manoah took a young goat and some grain, and offered them on the rock altar to Jehovah the God who works wonders. While the flames were going up from the altar, Manoah and his wife saw Jehovah's angel go up toward heaven in the flames. They did not see the angel again.