Then Elijah called to the people, "Come over here!" They all crowded around him as he repaired the altar of the LORD that had been torn down.
He took twelve stones, one to represent each of the tribes of Israel,
References for 1 Kings 18:31
and he used the stones to rebuild the LORD's altar. Then he dug a trench around the altar large enough to hold about three gallons.
References for 1 Kings 18:32