When fire fell on Elijah's altar, what did the people cry out as they fell facedown?

Answer: "The LORD, He is God!"

After the fire of the LORD consumed the sacrifice, the wood and the stones, the people fell facedown and cried, "The LORD, He is God!"

“Then the fire of the LORD fell and consumed the sacrifice, the wood, the stones, and the dust, and it licked up the water in the trench. When all the people saw this, they fell facedown and said, “The LORD, He is God! The LORD, He is God!””— 1 Kings 18:38-39 (BSB)